[[quoteright:296:[[WebComic/EightBitTheater http://static.tvtropes.org/pmwiki/pub/images/8btnever.jpg]]]]

->''"I cannot jump the distance, you'll have to [[FastballSpecial toss me!]]... Don't tell the elf."''
-->-- '''Gimli''', ''[[Film/TheLordOfTheRings The Lord of the Rings: The Two Towers]]''

HilarityEnsues because a character must perform an act that is either against their nature or which they have vehemently and constantly protested against doing. Said action can also be just plain humiliating or all of the above--to all parties, perhaps. When this act is aided or witnessed, a character insists that either they must all never speak of this again, ''ever''; or that a specific person who is guaranteed to ride them never hears of it. A common reply to comply with the sentiment is say something to the effect of "Speak about what again?".

This trope can be used to introduce a NoodleIncident, with one character reminding the other they promised never to speak of that again. Alternatively they may have just completed the action, make some passing reference to how unusual or interesting it was, and then pull this line.

Subversions can occur when the character(s) kept in the dark reveal themselves to have known all along or if the character who would have used the incident as ammunition, against all expectations, chooses ''not'' to do so. Sometimes that somebody will bring it up again and earning the reaction "I thought we agreed to never speak of it again" or something close to that.

It can be parodied by the person(s) who are told to never mention it again being genuinely unaware of what happened for whatever reason, leading them to ask something like "Speak about what again?", which is then taken by the person wanting the secret kept as a joke implying compliance with their wish.

Compare YouDidntSeeThat, NeverSayThatAgain, ThatDidntHappen, and BigLippedAlligatorMoment.



[[folder:Anime & Manga]]
* ''Manga/MahouSenseiNegima'':
** Asuna says this to everybody after an unfortunate incident involving TheWorldTree that turns Negi into "[[{{Determinator}} the kissing Terminator]]" who [[KissingUnderTheInfluence forces her into a french kiss]]... for so long that she nearly suffocates. Negi is still totally unaware that this happened.
** It happens again later under very similar circumstances, only this time the kisser was a Negi duplicate gone out of control, and the victim (and person saying it) was Akira.
* In the ''Anime/YuGiOhGX'' dub, Elemental Heroes Sparkman and Avian realize they were brainwashed into loving the Maiden in Love: "Guy pact -- this didn't happen, okay?"
* During the first ''Anime/YuGiOh'', Kaiba sums up the Noah filler arc as a "complete waste of [his] time and effort, so let's move on and pretend that nonsense never happened."
* In the ''Manga/{{Naruto}}'' anime filler episode where [[TheStoic Shino]] laughs and displays his sense of humor, he informs the title character in no uncertain terms to not mention it to anyone.
* In ''LightNovel/HaiyoreNyarkoSan'', the PrettyFreeloaders are setting up their own rooms and Mahiro goes to see how they're coming along. He walks into Cuuko's room and sees it's a StalkerShrine to Nyarko...and Cuuko herself is in the middle of humping a body pillow with Nyarko's picture on it. Mahiro silently backs out, closes the door, and says "I'll just pretend I didn't see that."
* In episode 10 of ''Anime/{{Free}}'', the swim club is having lunch at Goro's place when his stack of swimsuit magazines gets knocked over. As he picks them up, he looks them over and realizes that [[HotTeacher Miho Amakata]] is his favorite model, Marin-chan. He starts going all, "Oh my god, I was your biggest fan!" Miho gets ''very'' angry (she is not proud of her past as a model) and orders him to drop the matter and never mention it again.
* ''Manga/KenichiTheMightiestDisciple'': Kenichi and Miu have been alone at the dojo for two weeks; they ''almost'' [[SacredFirstKiss kiss]] when the Elder bursts through the main gate. Thus began the legend of The Night That Never Happened.

[[folder:Comic Books]]
* In ''ComicBook/ChaosWar'' #3, while under the influence of Venus's magic song, Amadeus admits to Thor that he loves him. Thor says he loves him too, and then says not to speak of it ever again.
* ''ComicBook/ScottPilgrim'':
** A panel featuring these exact words appears in volume 4, after Scott discovers [[spoiler: a drunken Knives and Kim making out.]]
** Volume 6 had Scott and Knives making out, [[spoiler: after coming to terms with the end of their relationship.]] It was horrible. For everyone. '''[[NoFourthWall And that includes]] [[FanDisservice you!]]'''
* The [[ComicBook/RedHulk Red]] and [[ComicBook/IncredibleHulk Green Hulks]] agree on this following the [[FusionDance Compound Hulk]] incident in ''Hulk'' #30.
* In ''[[WesternAnimation/TransformersAnimated Transformers Animated: The Arrival #2]]'', after Professor Princess blackmails Starscream into not attacking her (by threatening to broadcast an [[EmbarrassingOldPhoto image of him]] [[http://tfwiki.net/w2/images2/3/39/StarscreamProfessorArrivalIssue2.jpg in a wig and makeup]] around the galaxy), a rather perturbed Starscream says this [[VillainExitStageLeft and flies off]].
* Nikola Tesla made ''ComicBook/AtomicRobo'' promise that he would shoot Charles Fort and Creator/HPLovecraft if they should ever mention TheTunguskaEvent.
* In ''ComicBook/{{Fables}}'', PrinceCharming and [[Literature/BeautyAndTheBeast Beauty]] are working in an office during a heatwave. Nearly delirious, they briefly make out. They awkwardly agree never to bring it up again, especially not in the presence of her husband, Beast.
* Subverted in the new ''[[ComicBook/MsMarvel2014 Ms. Marvel]]''. Wolverine would very much like to not talk about the heroine [[spoiler:carrying him on her back when he was wounded]], but the girl unfortunately already uploaded the story on the internet.

[[folder:Fan Works]]
* In the Cropped Scan Theater rip of ''[[http://moonpants.org/cst.html Yami no Matsuei]]'', the first filler chapter which had no relevance to the rest of the plot was ended by this exchange:
-->'''Tsuzuki:''' And all's well that ends with shoujo bubbles and the acceptance of mortality. Now let us never speak of this again.\\
'''Matsushita-sensei:''' And they never did.
:: Thereafter, every filler or otherwise irrelevant chapter was ended by the narrator saying "...And they never did."
* ''[[WebVideo/YuGiOhTheAbridgedSeries Yu-Gi-Oh! The Abridged Movie]]'' gives us this exchange:
-->'''Yugi:''' Well, it's the end of the movie. All in all, it was kinda disappointing.\\
'''Téa:''' I can't help but feel it was all [[MerchandiseDriven just a cheap cash-in made to promote a bunch of cards.]]\\
'''Grampa Moto:''' It's almost like this whole story was thrown together at the last minute.\\
'''Pegasus:''' I agree. So, from now on, let's pretend it never happened.
* Freeza from ''WebVideo/DragonBallAbridged'' has one of these after an awkward conversation with Zarbon after the latter mentions his girlfriend.
-->'''Freeza:''' Oh... and all this time I could've sworn you were-- ...never mind.\\
'''Zarbon:''' What? You thought I was single?\\
'''Freeza:''' Well, no, I just... I thought you were into... you know, it really doesn't matter.\\
'''Zarbon:''' Well it matters to me, because, frankly it sounds like you thought I was--\\
'''Random Minion:''' Lord Freeza! Vegeta's broken out of the healing--[[KilledMidSentence TAAAAANK!]] (''dies by ki blast'')\\
'''Freeza:''' Oh no, that minion died. Could you go fix that? We'll continue this conversation never.
* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' fanworks:
** ''FanFic/GettingBackOnYourHooves'': Trixie feels this way about her confrontation with Fluttershy's "[[ItMakesSenseInContext ninja chicken]]".
** ''[[Fanfic/TheNuptialverse Post Nuptials]]'': When Fluttershy and Iron Will are walking through the Canterlot hedge maze during the wedding reception, they stumble across Octavia and Vinyl Scratch making out and quickly walk away.
--->'''Iron Will:''' Did you see...\\
'''Fluttershy:''' No.\\
'''Iron Will:''' Me neither.
** In ''Fanfic/{{Magnetism}}'', after [[CrazyJealousGuy Angel]] launches Rainbow Dash (and, [[ChainedHeat by accidental extension]], Fluttershy) into the Everfree Forest, and the two pegasi work their way out, the two hug, and:
--->''Their glares communicated much to the other and while the majority of their exchange consisted of varied insults and death threats, the one message they both shared for the other was, "Let us never speak of this again."''
** ''[[FanFic/EakinsHardReset Hard Reset]]'': Twilight and Spike have this as a standing arrangement regarding her time as an EmoTeen.
** Happens in ''[[http://www.fimfiction.net/story/94339/6/eakins-rapid-fire-pony-fics/the-legend-of-the-enchanted-spatula The Legend of the Enchanted Spatula]]'' [[NoodleIncident for some reason]].
--->'''Luna:''' You can't blame me for what happened. I don't even know where the cultists found that much jam living inside a volcano, much less how they kept it from going bad.\\
'''Celestia:''' You could have warned me about the ferrets, at the very least. And then to top it all off this "epic artifact of immense power" turns out to be--\\
'''Luna:''' The book didn't mention that! I don't know what the Order was thinking! I don't even know how you'd do that to a spatula! Those poor, poor quiches. Their sacrifice shall never be forgotten.\\
'''Celestia:''' Oh, yes it will. Because we are never going to speak of this again. Ever. Especially not to Twilight. Do you understand?
** ''WebVideo/UltraFastPony'':
*** In "Purple Party Pooper", Twilight and Rarity accidentally mention humans. Humans are apparently the ElephantInTheLivingRoom, with some dire but unstated consequences for acknowledging them. Twilight and Rarity both panic briefly, then agree to just pretend that the entire conversation never happened.
*** In "The Cheesen One", Scootaloo has to fill the vacated [[TheScapegoat village idiot]] position while Rainbow Dash is on vacation. Afterwards:
---->'''Rainbow Dash:''' Thanks for covering for me while I was gone, Scootaloo.\\
'''Scootaloo:''' Don't ever mention it. Ever.
** ''Fanfic/ShadowsOfGiants'': Rainbow Dash bursts into tears when she is turned into a human since she doesn't have wings. When she calms down, she tells her friends not to tell anyone that she cried.
* ''Franchise/HarryPotter'' fanworks:
** In ''[[http://www.fanfiction.net/s/5643463/10/A-Door-Ajar A Door Ajar]]'' Sirius hides Harry's invisibility cloak right before he's supposed to be leaving for a new school.
--->'''Harry:''' Don't make me give you another flea dip, mongrel.\\
'''Sirius:''' We agreed to never speak of that again.
** In ''[[http://www.fanfiction.net/s/8045114/15/A-Marauder-s-Plan A Marauder's Plan]]'' Harry derails Sirius' attempt to tease him by threatening to tell Remus about "the time Healer Fay was over when we were swimming and you lost your..." and Sirius protests that "We swore we would never speak of that." Later on, after receiving a second-hand sex talk from a pensieved memory of Harry's father, he and Neville agree to never mention it again.
** In ''[[http://www.fanfiction.net/s/6173090/7/Lightning-and-Thunder Lightning and Thunder]]'' Remus mentions the time they were playing indoor hide-and-seek and hid in [=McGonagall=]'s classroom, only for Sirius to protest "We swore we wouldn't bring that up again!"
** In ''[[http://www.fanfiction.net/s/5152550/14/The-Search-for-Life-and-Death The Search for Life and Death]]'' Remus is teasing Sirius about an accidental encounter with love potion and Sirius replies "The Great Potion Blunder of fourth year was never to be brought up again!"
** In ''[[http://www.fanfiction.net/s/7724057/67/Family-Bonds Family Bonds]]'' Harry is teasing Snape about having gotten lost in the forest on his own inherited property and Snape replies "I thought we had agreed not to mention that ever again!"
** In ''[[http://www.fanfiction.net/s/8610965/11/The-Cursed The Cursed]]'' Ron, while enthusing about Harry's first-year flying skills, mentions how close he and Neville were to being turned into a pancake and Neville replies "I thought we had agreed never to talk about it ever."
** In ''[[https://www.fanfiction.net/s/10359113/5/Tempest-of-the-Fae Tempest of the Fae]]'' one of the wands Luna tries turns a table into a talking puppet which runs away before anyone can change it back and Ollivander comments "I believe we should all agree not to speak of that again."
* Taniguchi and Kunikida decide to do this in Chapter 31 of ''Fanfic/YouGotHaruhiRolled'' after they learn that Itsuki has SingleTargetSexuality for [[EvenTheGuysWantHim Kyon]].
* Chapter 57 of ''FanFic/PaperMarioX'' includes the following exchange:
-->'''Sushie:''' Does this make up for the volcano thing?\\
'''[[Franchise/SonicTheHedgehog Sonic]]:''' ...as long as we '''never''' speak of it again!
* Taken to a very dark and emotional extreme in ''[[http://www.fanfiction.net/s/9283692/1/Uplifted-Last-Days Uplifted: Last Days]]'' when [[spoiler: Joachim Hoch, with the assistance of Heinz Heydrich, Hans-Gerd von Rundstedt, Claus von Stauffenberg and Admiral Zorah saves Ten children from Buchenwald Concentration Camp. He does not want this act to be exploited or used to prove he's changing in fears that people will assume that it was a token gesture..]]
* ''FanFic/DeadOrAlive4TheDevilFactor:'' Just about all of the ''[[VideoGame/DeadOrAlive DOA]]'' girls view the events of ''Dead or Alive Xtreme Beach Volleyball'' as embarrassing and largely refuse to speak of them.
* In ''Fanfic/CalvinAndHobbesTheSeries'', Hobbes and the MTM decided to do this when a void they spent the whole episode trying to stop [[AntiClimax closes itself up at the last second.]]
* In the ''Fanfic/HorseshoesAndHandGrenades'' sidestory ''Month of Sundays'', this exchange occurs.
-->''Taira:''' A ninja (Ibuki) [[HeyYouHaymaker helping a samurai]]. Don't tell this to my parents."
* Ruby says this to her sister Yang in ''FanFic/ReactWatchBelieveYikes'' after the younger girl accidentally lands [[MarshmallowHell on her sister's assets.]]
* ''FanFic/TheInfiniteLoops'' will sometimes land Loopers into situations that they want kept off the record for the rest of their very long lives. Hence, this trope is prevalent.
* Within the ''Fanfic/{{Pokeumans}}'' FanVerse, not talking about the spinoff titled ''Chosen'' which broke almost every single rule the group had has become a sort of group meme.

[[folder:Films -- Animation]]
* Crane says this to Po in ''WesternAnimation/KungFuPanda'' after Crane helps him out of an uncomfortable position.
-->'''Crane:''' [[ThinkNothingOfIt Don't mention it]]. ''Ever''.
* A variation in ''WesternAnimation/IceAge2TheMeltdown'': After Diego and Sid are easily beaten up by two possums:
-->'''Diego:''' If anybody ever asks, there were fifty of them. And they were... rattlesnakes."
* ''WesternAnimation/HeyArnold'': This may be what Arnold was going for in TheMovie after Helga confessed her love and kissed him.
* In ''WesternAnimation/PenguinsOfMadagascar'', Skipper invokes this after the team dress up in lederhosen to distract the octopi.
-->'''Skipper:''' We take this shame to our graves.\\
'''Kowalski:''' Agreed.

[[folder:Films -- Live-Action]]
* The ''Film/StarskyAndHutch'' film has this in spades. After Starsky (Ben Stiller) and Hutch (Owen Wilson) have to do some fairly embarrassing things to get information out of a con, Hutch starts to talk about it in the car ride back, and Starsky shuts him. "No! No! Let's not talk about it. In fact, let's never speak of this again." Of course, when they get back to the station, it's been recorded and is playing in the Captain's office with all of the other officers watching.
* In the film version of ''[[Film/TheLordOfTheRings The Lord of the Rings: The Two Towers]]'' Gimli says the above quote before having Aragorn use him in a FastballSpecial (a reference to a scene in the first movie in which he objected to being thrown by Legolas). Aragorn promises not to say a word.
* ''Film/HaroldAndKumarGoToWhiteCastle'', the incident with [[UglyGuyHotWife Freakshow and his hot wife]].
* An oblique variant in ''Film/{{Spaceballs}}'': after watching the painful footage of being catapulted into the bulkhead of Spaceball One, Dark Helmet says "No, no. Go past this part. In fact never play this part again."
* ''Film/TheHuntForRedOctober''. After Admiral Greer fakes the torpedoing and destruction of the ''Red October'', he tells the torpedo control officer of the frigate he's on:
-->'''Admiral Greer:''' Now, Commander... that torpedo did NOT self-destruct. You heard it hit the hull, and I... [[IWasNeverHere was never here]].
* In the end of ''Film/{{Zathura}}'', [[spoiler: the sister Lisa says this to her younger brothers, mainly because she thought the future version of one of them was hot before finding out who he was]]. They bring it up anyway.
* Burt Gummer says this after surviving being swallowed by a Graboid in ''Film/Tremors3BackToPerfection''.
-->'''Burt:''' I would prefer... we keep this... to ourselves.
* ''Film/WildWildWest'': When Jim West gets [[ItMakesSenseInContext stuck to Artemis Gordon's belt buckle]], he tells Gordon to make sure and leave that part out when retelling the story. Artemis responds with a very emphatic "Oh don't worry."
* ''Film/PulpFiction'':
** A less funny example: after Butch saves him from Zed's... attentions, Marsellus Wallace demands two things, of which the first is... "Don't tell nobody about this. This shit is between me, you, and [[RapeAndRevenge Mr. Soon-to-Be-Living-the-Rest-of-His-Short-Ass-Life-in-Agonizing-Pain Rapist here]]. It ain't nobody else's business."
** Earlier, Vincent Vega and Mia Wallace both agree not to tell anyone, especially Mia's husband Marsellus, that she almost died of a heroin overdose and Vincent had to inject adrenaline directly into her heart to keep her alive.

* ''Literature/{{Discworld}}'':
** ''Discworld/LordsAndLadies'': No one should even ''mention'' the Stick and Bucket Dance. Not '''ever'''. [[spoiler:At least, not once the Lancre Morris Men are done using it to kick elven ass.]]
** Also in ''Discworld/WitchesAbroad'', after the witches take part in it, nobody mentions the Thing With The Bulls ever, ever again. At least not around the men.
* In ''Literature/PrideAndPrejudiceAndZombies'' the Bennet girls come across a zombie mother and infant and find themselves unable to kill them. Afterward they swear never to mention it again.
* Spoken by an assassin named Whip to his driver in the C.J. Box novel ''Literature/StoneCold'' when he's being driven away from the scene of a hit he just performed and the victim turns out to [[NotQuiteDead still be alive]] and sits up (whilst in the body bag) in the back seat, prompting Whip to unload another few slugs into his head for good measure.

[[folder:Live-Action TV]]
* ''Series/{{Heroes}}''. Just so there are no misunderstandings, Nathan can fly:
-->'''Matt Parkman:''' (''after riding Nathan Petrelli to Texas'') We never talk about that again.
* In ''Series/{{Seinfeld}}'', George dates a woman who looks like Jerry. George tries to come up with things that the relationship can be 'about' so as not to deal with the idea that he might harbour homosexual feelings for Jerry. The woman gets gum in her hair and cuts it out, making her hair short like Jerry's. George runs away screaming. Later, at the coffee shop, George and Jerry are talking about the incident and George says 'We must never ever speak of this'. Afterwards Jerry awkwardly asks George if he wants to go and see a movie. George refuses, instead saying that he's 'going to take a few days off', which Jerry agrees is probably for the best.
* ''Series/{{Friends}}'':
** Ross and Richard are having a sleepover at Rachel and Monica's. At one point they bump into each other in the living room, wearing their girlfriends' bathrobes. After a few awkward seconds they attempt small talk, but then Richard cuts to the chase and says "Let's never speak of this again." Ross says "You got it." and they move on.
** Also in "The One Where Joey Loses His Insurance", Joey thanked Chandler for helping him take a shower when he had a hernia, and Chandler freaked out and said, "Now, is ''that'' never talking about it again?!"
** And there's the time that Monica is stung by a jellyfish. A friend who will pee on you is a friend indeed.
* ''Series/StarTrekTheNextGeneration'':
** The episode "[[Recap/StarTrekTheNextGenerationS1E2TheNakedNow The Naked Now]]" features all sorts of weird events when the ''Enterprise'' crew falls under the influence of a virus that basically makes everyone more than a little drunk (including Data). One scene features Data meeting up with Tasha Yar in her quarters, where they end up having sex. After the virus has been purged and everyone is sober again, Tasha and Data are back at work on the bridge, where she tells him, "I'm only going to say this once: It never happened."
** In "Skin of Evil", Tasha's funeral speech was supposed to include an apologetic "Data, it ''did'' happen." It's clear to see where it was supposed to be, as they left in Geordi's reaction shot.
** During Data's trial [[WhatMeasureIsANonHuman to determine whether he is a full-fledged person with rights]], Picard persuades him to reveal it. (He may not have held her to it, but Data clearly has some feelings for her, given that he keeps a holographic "photograph" of her in his quarters.)
** And it's also alluded to in ''First Contact''. Thus, there are some instances where it's treated as if the above scene wasn't cut.
* ''Series/StarTrekEnterprise'': "In a Mirror, Darkly" features this darkly amusing exchange between Mirror Tucker and Mirror T'Pol:
-->'''Tucker:''' I did you a favor once.\\
'''T'Pol:''' We agreed never to discuss that.\\
'''Tucker:''' And I haven't.\\
'''T'Pol:''' I'd hardly call it a favor, you enjoyed yourself.\\
'''Tucker:''' Several times as I recall. So, how many years is it 'til your [[MateOrDie pon farr]] comes around again?
* ''Series/StarTrekVoyager''. Averted when B'Elanna Torres tries this in "Blood Fever" after a similar MateOrDie is barely averted. Tom Paris [[UncomfortableElevatorMoment stops the turbolift]] and insists they ''do'' talk about it, as they're going to be stuck on the same ship for years.
* Way back in ''[[Series/StargateSG1 Stargate SG-1]]'s'' first season the Goa'uld Hathor took over stargate command and [[http://tvtropes.org/pmwiki/pmwiki.php/Main/LivingAphrodisiac used pheromones to control the male population.]] Several seasons later Dr. Fraiser is going over O'Neill's medical files.
-->'''Fraiser:''' He had his shoulder punctured by an alien time capsule device. Erm ... three knee operations ... that's the whole Hathor incident which he's asked me never to discuss.
* In one episode of ''Series/{{Scrubs}}'', Dr. Cox invokes this trope after Dr. Kelso gives an all-too-graphic description of his and Mrs. Kelso's recent sexual encounter.
* ''Series/BuffyTheVampireSlayer'':
** From the episode "Real Me":
--->'''Buffy:''' How bored ''were'' you last year?\\
'''Giles:''' I watched ''Series/{{Passions}}'' with Spike. Let us never speak of it again.
** Spike and Andrew have an exchange on their mutual love of onion blossoms while en route to a mission, ending with:
--->'''Spike:''' Yeah. (''beat'') Tell anyone we had this conversation, I'll bite you.\\
'''Andrew:''' Right.
** A vampirized Harmony meets Xander and decides to feed. They apparently regress to their grade school enemy stage (since both of them ''can'' fight better), and they're so ineffectual that they eventually just give up. They agree it never happened, and both leave.
** Xander after telling Buffy he was once roped into working as a male stripper. "...and no power ''on this Earth'' will make me tell you the rest of that story."
* ''Series/{{Angel}}'' played it for laughs in the episode "The Girl in Question". The head of Wolfram and Hart's Rome branch used it several times.
-->'''CEO lady''' (''spit'') We will speak of it no more!
* In an episode of ''Series/WouldILieToYou'', Neil Morrisey, voice of WesternAnimation/BobTheBuilder, had as one of his "facts" that he once had a builder working at his house who was in fact named Bob. David Mitchell said that if that was true, it was completely unremarkable, and the conversation probably went, "Do you know, I'm actually a builder called Bob." "Right. I do the voice of Bob the Builder." "Right." [short laugh all around] "Let us never speak of this."
* ''Series/TheWestWing'' {{lampshaded}} its frequent use of of the WalkAndTalk by having Sam and Josh walking through the crowded hallways having a conversation as usual. At the end, they both came to a stop and asked each other where they were going. Turns out they were both following each other.
-->'''Josh:''' Let's not tell anyone about this.
* ''Series/DoctorWho'':
** In the episode [[Recap/DoctorWhoS29E2TheShakespeareCode "The Shakespeare Code"]], two of Creator/WilliamShakespeare's Acting Troupe agree to this after inadvertently (and thankfully, temporarily) summoning a [[SealedEvilInACan Carrionite]] while reading aloud the WordsOfPower inserted into the play's script by the MonsterOfTheWeek.
** The Doctor also had one of his own when the head of Torchwood found out that the woman he'd claimed was Rose Tyler was actually Rose's mother.
--->'''The Doctor:''' Please, when Torchwood comes to write my complete history, don't tell people I traveled through time and space with her mother.
* ''Series/TheBigBangTheory'': After returning from a research grant in Antarctica, Leonard, Sheldon, Howard, and Raj repeatedly talk about how they weren't going to talk about "the night the heat went out." Sheldon, being Sheldon, brought it up anyway. (They huddled together naked.)
* In ''Series/BabylonFive'', after learning the secret of the 'tentacles' Londo were using to cheat at cards, Lennier decides to swear an oath of silence on the matter.
* ''Series/ICarly'':
** Between the Shay siblings, notably, Carly's NoPeriodsPeriod in "iDate a Bad Boy" and Spencer's attempt at giving Carly TheTalk in "iSpeed Date".
** Sam and Freddie's agreement about their First Kiss. When Sam's drugged slip-of-tongue reveals it to Carly, HilarityEnsues.
* ''Series/{{Rome}}'':
** Cleopatra wants to use TheBabyTrap on Caesar, but knowing that Caesar has no sons, (and possibly needing a distraction from her withdrawal symptoms after GoingColdTurkey) she decides to increase her chances of pregnancy by sleeping with one of the legionnaires that Caesar sent to escort her to him. She first orders [[TheStoic Vorenus]] to sleep with her, but Vorenus (despite being sorely tempted) refuses due to fidelity to his wife and Roman sexual attitudes to the idea of being "used" for sex. Vorenus then orders the other legionnaire, [[BoisterousBruiser Pullo]] to "Report to Princess Cleopatra and do whatever she tells you to." Cue a prolonged and [[TheImmodestOrgasm noisy]] bout of sex, much to the discomfort of Vorenus. When Pullo returns, they have the following conversation:
--->'''Pullo:''' Gods, that was something, let me tell you.\\
'''Vorenus:''' I don't want to hear about it. If you're wise, you'll never speak of this again.\\
'''Pullo:''' Why? [[JustFollowingOrders I was only obeying orders]]. Bloody good orders, too.
** When the youthful Octavian comes home after being kidnapped in Gaul, then rescued by Vorenus and Pullo, his rather shallow mother fusses over him. "Was it very horrible?" (''Octavian opens his mouth'') "Of course it was, we shan't even talk about it. Let's put it totally out of our minds."
* ''Series/GreysAnatomy'':
** Invoked almost verbatim by Cristina in the episode "Complications of the Heart", after a surgery wherein both she and the more experienced Dr. Altman forgot how to perform a very basic procedure and ended up needing the nurse to bail them out.
** Also nearly word by word in the episode "Physical Attaction...Chemical Reaction", during one of the many "awkward sex" scenes, when Izzie and George try fantasy to revive their chemistry. It does not end pretty.
---> '''George:''' I think I chipped my tooth.
* Almost verbatim on ''Series/ThePeterSerafinowiczShow''. Upon making a breakthrough deduction in a case, Sherlock Holmes [[spoiler: becomes so sexually aroused that he forces himself on Watson. In post-coital reflection]], Holmes says "We shall not speak of this again."
* In ''Series/WhiteCollar'' episode "Power Play", Neal and Peter have to swap identities. This leads to Peter asking the whole office to go along with it.
-->'''Peter:''' Listen up, everybody. For the next hour, and only the next hour, you will call Mr. Caffrey Special Agent Peter Burke. No questions, no laughing, just do it. And never speak of this again.
* ''Series/{{JAG}}'': When Admiral Chegwidden receives a mysterious tape with no return address in his office, he has Petty Officer Tiner play it. [[spoiler:It is a video of the Admiral's fiance dressed seductively holding the roses he sent her quoting Shakespeare and inviting him to a very special dinner.]] The Admiral cuts the tape off midway and tells Tiner to never speak of this again. Tiner wisely claimed nothing happened.
* Dean invokes this in ''Series/{{Supernatural}}'' when he has to talk [[IncompatibleOrientation Charlie]] through flirting with the male security guard with Sam listening in. Sam never does mention it again, but that doesn't keep him from laughing his head off all the way through it.
* In the series 5 episode 1 of ''Series/{{Misfits}}'', Alex develops the power to [[IntimateHealing remove the powers of others by having sex with them]]. Meanwhile, Finn gets [[DemonicPossession possessed by the devil]]. Alex has to use his new power to get rid of the devil. Afterwards, Alex and Finn try to get the group to agree never to speak of this again. Rudy, being Rudy, keeps bringing it up.
* In ''Series/BlackBooks'' while reminiscing/complaining about their terrible holiday, they stumble on one part they weren't supposed to bring up.
--> '''Fran:''' And remember when those tribesmen thought Manny was a god?\\
'''Manny:''' Yes, it'll be quite some time before I want to sacrifice another monkey.\\
(''Bernard lunges across the table and seizes Manny by the shirt'')\\
'''Bernard:''' [[NoodleIncident WE SAID WE WOULDN'T TALK ABOUT CANADA!]]

[[folder:Video Games]]
* In ''VideoGame/HarmoKnight'', Master Woodwin, after talking to you once you [[spoiler:beat the [[TheVeryDefinitelyFinalDungeon Final Trial]] level]], tells you to never talk about him losing his staff again. Because, as he says, that would press the princess's BerserkButton.
* ''VideoGame/{{Psychonauts}}'':
** There's a Mental PhlebotinumBreakdown in Sasha's mind, and a horrible mutated monster comes up and proceeds to pound the living daylights out of Sasha in a highly embarrassing fashion. Raz saves Sasha's life, for which Sasha grants him his merit badge. This conversation then occurs:
--->'''Raz:''' So, is this the part where I get a speech and learn another lesson...?\\
'''Sasha:''' No. Here is your merit badge. Let us never speak of this again.
* ''Franchise/ShinMegamiTenseiPersona'':
** ''VideoGame/{{Persona 3}}''
*** The {{Love Hotel|s}} Incident.
*** The aftermath of Mitsuru's "[[MaximumFunChamber Execution]]" during the Kyoto class trip. Akihiko is ''[[HeroicBSOD very insistent]]'' about this point.
** In ''VideoGame/{{Persona 4}}'':
--->(''the team's gathered in a classroom to discuss the case'')\\
'''Yousuke:''' But man, seeing [Kanji] here kinda reminds me of the school campout.\\
'''Kanji:''' I thought we were all gonna forget about [[HorribleCampingTrip what happened]]...\\
'''Yousuke:''' Oh... Sorry.\\
(''all three guys look depressed'')
* ''VideoGame/DragonAgeOrigins'':
** Sten says this to Leliana when she sees him playing with a kitten and picking flowers.
** Also comes up after the threesome/foursome with Isabela in ''The Pearl''.
--->'''Zevran:''' I don't mind never speaking of it again, as long as we could do it again.
** Something of a RunningGag in ''VideoGame/DragonAgeInquisition''.
*** [[UnreliableExpositor Varric]] claims that this is what the Qunari said about the Arishok's unauthorized invasion of Kirkwall in ''VideoGame/DragonAgeII''.
*** If [[PlayerCharacter the Inquisitor]] is a human mage, the [[TheArchMage First Enchanter]] of the Ostwick Circle of Magi said this in response to [[NoodleIncident something bizarre]] that happened during the Inquisitor's Harrowing.
*** If the Inquisitor is a Qunari, one of the other members of their mercenary band said this to a donkey after an EscortMission [[NoodleIncident apparently went south]].
*** After the player finds Cassandra [[spoiler:reading "smutty literature" that had been written by Varric]] she asks that you pretend you don't know that about her.
* In ''VideoGame/CaveStory'', one of your fights with [[GoldfishPoopGang Balrog]] begins after you ''almost'' trick him into helping you with a feat that requires great strength. When you win, he yields and assists you ([[spoiler:this is one of the hints dropped to you that he isn’t really such a bad fellow; [[PunchClockVillain he's just doing his job]]]]). He entreats you, however, not to tell anyone he did it.
* ''VideoGame/SamAndMaxFreelancePolice Abe Lincoln Must Die!'' has Sam and Max take a date test to find the perfect match for each other. The result gives... Sam to Max and Max to Sam. Both agree never to speak about it again.
* One of the categories for the third annual Neopies on ''Franchise/{{Neopets}}'' is named after this trope.
* ''VideoGame/DawnOfWar II'' agrees with fans' opinion of the previous ''Soulstorm'':
-->'''Cyrus:''' Kaurava was a huge mistake... [[CanonDiscontinuity I will not speak of it again.]]
* In ''VideoGame/TheElderScrollsVSkyrim'', this is, word for word, one of the dialogue choices available after you let an apprentice mage [[http://www.youtube.com/watch?v=sYqA73LdT5w practice a spell on you.]]
* ''VideoGame/TeamFortress2'':
** Suggested with the InUniverseMarketing for [[UrineTrouble Jarate]].
-->''You may say, "But I don't HAVE any enemies!" Well, do you have FRIENDS? Are they on FIRE? Right NOW? Jarate them to a non-on fire state INSTANTLY! Being on fire is horrible! They'll never want to talk about your Jarate rescue ever again, but you'll have their secret undying gratitude!''
** On the Special Delivery mission, once the rocket lifts off and immediately crashes the Announcer might have this to say:
--->'''Announcer:''' Gentlemen, this never happened.
* In the ''VideoGame/MassEffect3'' Citadel DLC, it is possible for Female Shepard and [[spoiler:Javik]] to [[spoiler:end up in bed together]] after the party:
-->[[spoiler:'''Javik:''' It turns out there is one thing primitives are good at.]]\\
'''Shepard:''' ''Not a word.''
* In ''VideoGame/SaintsRowTheThird'' you need to impersonate [[spoiler: Cyrus Temple, the [[ArmiesAreEvil STAG]] commander, to rescue the kidnapped Shaundi, who is being held in a STAG carrier chock-full of enemies. When you get to the second-in-command, the Boss tries to make some chit-chat]]. If you've chosen the "Cockney" voice, [[TheDevTeamThinksOfEverything she'll notice and call you out on your sudden British mannerisms]]. The Boss handwaves this saying "Oh, I must have picked that up when I was stationed in Britain" and she replies "You've never been stationed in Britain, [[spoiler:commander]]". The Boss' answer: "I know. Let us never speak of this again". Astonishingly, this works.
* In ''VideoGame/SaintsRowIV'', after being rescued from a Zin simulation, Kinzie warns the Boss to ''never'' speak of the fact [[spoiler: she was forced to wear a poodle skirt.]]

[[folder:Visual Novels]]
* ''VisualNovel/ApolloJusticeAceAttorney'', case 2:
-->'''Trucy:''' I can still remember that moment... You brandished those bloomers on high, and shouted... "Objection!"\\
'''Apollo:''' ...Here's what I want you to do, Trucy. Take that memory, gently lock it away deep in your heart, and never speak of it.

[[folder:Web Comics]]
* ''Webcomic/TheOrderOfTheStick'':
** While being interviewed for the LawfulGood afterlife, hero Roy Greenhilt stops the deva interviewing him before she can mention a GenderBender incident within earshot of his father, who is standing not ten feet away.
** During that very incident, Roy also insisted Belkar not know. Subverted in that Belkar knew it was Roy all along and was comfortable enough with his masculinity to hit on Roy purely to mess with him.
** And during Azure City's New Year, Belkar [[KissingUnderTheInfluence gets drunk and kisses Vaarsuvius full on the lips]]. Afterwards, Belkar forgets it entirely and Vaarsuvius insists that, if the one witness to the kiss (Durkon) ever has to discuss it again, it will be referred to it as "the Event". And they never talk about it again.
** When Vaarsuvius is rescued from the Para-Elemental Plane of Ranch Dressing, he/she mentions that there were some adventures before they got there.
--->'''Belkar:''' Maybe we'll see that as a bonus story in one of the books!\\
'''V:''' Maybe we shall never mention it again.\\
'''Belkar:''' Yeah, probably that.
* ''Webcomic/BrawlInTheFamily'': In [[http://brawlinthefamily.keenspot.com/2013/06/14/495-comic-review-e3-2013/ 495 strip]] ''VideoGame/MegaManClassic'' really DOES NOT want talking about his stint in the ''WesternAnimation/CaptainNTheGameMaster'' cartoon or being reminded of it.
-->'''[[VideoGame/KidIcarus Pit]]:''' Hey Man! Haven't seen '''you''' in a while. ''[[WesternAnimation/CaptainNTheGameMaster Now we just need to get]]'' ''[[Franchise/{{Castlevania}} Simon]]''--\\
'''Mega Man:''' SHH! Don't bring that up!\\
'''Pit:''' Bring up '''WHAT'''-[[CanisLatinicus icus?]]\\
'''Mega Man:''' '''AARGH!'''
* ''Webcomic/ElGoonishShive'':
** [[http://www.egscomics.com/?date=2002-06-15 Elliot seeing Tedd without his glasses]] while being [[GenderBender gender bent]] (and potentially bisexual) gets this reaction. Not that it stopped them from [[http://www.egscomics.com/?date=2005-10-05 speaking of it again]].
** [[http://egscomics.com/?date=2010-11-19 Grace's suggestion that Elliot turn into her to be sexy in front of a mirror]] seems doomed to a similar fate.
** In another instance, Grace and Sarah attempted to prank Tedd by using a transformation device to make Sarah look exactly like Grace. Unfortunately, when Tedd encounters Sarah as Grace, he immediately kisses her. While there is no dialogue in the [[http://www.egscomics.com/index.php?id=1823 comic itself,]] the commentary states that they decided to never speak of it again.
* ''Webcomic/SluggyFreelance'' [[http://www.sluggy.com/comics/archives/daily/000419 has a great one]]
-->'''Crystal:''' My head is killing me. Does anyone remember what happened after the tequila shots?\\
'''Riff:''' Let's see. We're charred, we have twigs in our hair and we're covered in ducks.\\
'''Bun-bun:''' I vote we all go home and never speak of this again.
* ''Webcomic/{{Bard}}'': [[http://barred.smackjeeves.com/comics/850119/how-to-improvise/ Vas]] uses his [[GenderBender change of gender]] to quell the rage of one of the more violent patrons by... stuffing her face into his new rack. It takes a bit for this to register with him, though.
* In ''Webcomic/QuestionableContent'' [[http://www.questionablecontent.net/view.php?comic=447 #447]], Marten and [[spoiler: Marten's mother, who is a professional dominatrix]] return to his apartment to find Pintsize wrapped up in bondage gear, which prompts this line to be spoken.
* ''Webcomic/{{Homestuck}}'':
** Karkat takes this to the logical extreme by [[spoiler:trolling John backwards, so that they'll never be able to talk about the first conversation (from Karkat's perspective), where Karkat accidentally reveals his hatecrush for John. Needless to say, it's hilarious.]]
** Dave also does this [[http://www.mspaintadventures.com/?s=6&p=002256 early on in the strip]], after royally screwing up his fetch modus and losing the beta in the process, despite there being no one around to have seen him.
--->'''Dave:''' No one can ever know about this.
** [[http://www.mspaintadventures.com/?s=6&p=007678 "Let us never speak of ACT 6 ACT 5 ACT 2 again."]]
* In ''Webcomic/{{Housepets}}'', Peanut Butter and Grape happen to see Fido and Sabrina do... something, in [[http://www.housepetscomic.com/2008/09/26/goodnight-everybody/ this comic]]. Afterward, Grape tells Peanut[[note]]who took a picture of the "something", though the viewer never gets to see it[[/note]], "We never speak of this again."
* ''Webcomic/OneOverZero'': Used by the characters after a revelation from Tailsteak.
* ''Webcomic/SchlockMercenary'': [[http://www.schlockmercenary.com/2011-05-21 Ennesby to Schlock]], after a particularly [[http://www.schlockmercenary.com/2011-05-20 unpleasant moment]].
* In ''Northern Edge'' (a spin-off of Fred Perry's ''ComicBook/GoldDigger''), Sheila just want to forget all about she and two companions being spanked by tentacles. Fat chance of this, though, since there was [[http://ne.tsunami-art.com/view.aspx?Rec=24 a rune artist present on the scene to immortalize it]].
* In ''Webcomic/BlueYonder'', after [[http://www.blueyondercomic.net/comics/1371537/blue-yonder-chapter-1-page-41/ Lena tricks them into fleeing a cellphone]], one attacker tells another, "No one has to know."
* In ''Webcomic/GirlGenius'', Gilgamesh orders that his NiceHat should be hidden in a safe place--[[http://www.girlgeniusonline.com/comic.php?date=20120116 and never spoken about again.]]
-->'''[=DuPree=]:''' I heard there was a ''hat!''\\
'''Gil:''' You're ''delusional''.
* The trope image comes from ''Webcomic/EightBitTheater'', after... [[NoodleIncident some shenanigans]] caused by the nightmare inducing poison the Light Warriors had recently unwittingly ingested.
* What happened in ''Webcomic/BrunoTheBandit'' after Numth'kul took a cross-dressing Maledict [[http://www.brunothebandit.com/d/20060616.html on a date]].

[[folder:Web Original]]
* ''Blog/ThingsMrWelchIsNoLongerAllowedToDoInAnRPG'': Lives up to the trope by only telling us what can't be talked about, but [[NoodleIncident no real details]].
-->1708. No bringing up the time we were nearly TPK'd by a jerboa.
* Quoted during Podcast/RiffTrax's take on ''Film/TheLastAirbender'' after they see [[MemeticMutation The Pebble Dance]].
* A double {{GIRL}} on [[http://www.bash.org/?768122 bash.org]] provokes this reaction from the participants. Subverted. [[HilariousInHindsight Since it's on bash.org and all]].
* A RunningGag throughout the LetsPlay/MarioPartyTV group's first playthrough of Mario Party 9 is agreeing that they'll finish this run, set the game aside, and act as if it doesn't exist.
* Agent Supernumerary of the Roleplay/ProtectorsOfThePlotContinuum is quite specific about the fact that when he says it's "unspeakable," that means he does ''not'' want Agent Suicide to keep talking about that little incident with a reality-warping typo and some very surprised goblins.
* At the end of ''[[Creator/ThisIsIt Don't Hug Me I'm Scared]]'', when the characters' attempts to be creative result in some...[[SurpriseCreepy stuff]], the Notepad finally concludes "Now let's all agree to never be creative again."
* ''WebVideo/DragonBallZAbridged'', after an awkward conversation between Frieza and Zarbon concerning [[spoiler:[[CampStraight the latter's sexuality]].]]
-->'''Frieza''': "[[DullSurprise On no, that minion died]], could you go fix that, we'll continue this conversation ''never''."

[[folder:Western Animation]]
* ''WesternAnimation/SouthPark'': In the "Fantastic Easter Special" episode, Jewish Kyle and {{Jesus}} Christ are locked in a cell. Jesus can escape to stop the episode's villain, but only if Kyle kills him so he can resurrect outside the building. Being notably Jewish, Kyle is less than enthusiastic about the idea, but eventually agrees on the condition that, "Eric Cartman can ''never'' find out about this."
* ''WesternAnimation/TheSimpsons'':
** The Itchy and Scratchy Land episode, after Homer takes a disastrous shortcut:
--->'''Homer:''' All right, we're here. Let us never speak of the shortcut again.
** Marge also used the line in the same episode.
--->'''Marge:''' This truly was the best vacation ever. [[NegativeContinuity Now let us never speak of it again.]]
** Marge also said it in regard to a relative who snapped and went on a shooting spree:
--->'''Marge:''' Well, Bart, your Uncle Arthur used to have a saying: "Shoot 'em all and let God sort 'em out". Unfortunately, one day he put his theory into practice. It took 75 Federal Marshalls to bring him down. Now let's never speak of him again.
** This also happened after the episode where Principal Skinner was revealed to be really an imposter named Armin Tamzarian. They cleared up the problem by deciding they [[WeWantOurJerkBack were happier with the fake Skinner]], and the real one was run out of town. The local judge issues a decree that no-one will ever mention it again, under penalty of ''torture''.
*** And, [[RuleOfFunny this being]] ''[[RuleOfFunny The Simpsons]]'', they ''do'' mention it again -- when Skinner is giving Lisa a hard time about naming a new cat of hers the same as her old cat, she calls him Mr. Tamzarian.
*** On the DVDCommentary for ''I, (Annoyed Grunt)-Bot'', the episode with that CallBack, Al Jean indicates he inserted the joke himself as a TakeThat to that episode.
** ''Another'' episode introduces Grandpa's brother Cyrus, with dialogue to this effect (paraphrasing):
-->'''Bart & Lisa:''' You never told us you had a brother, grandpa.\\
'''Grandpa:''' Yes, and I'll never speak of him again.
* ''WesternAnimation/ThePowerpuffGirls'' had episode "ShotgunWedding", in which the Professor tries to learn more about Fuzzy Lumpkins [[ForScience for the purpose of science]], and after getting covered in mud, flowers, and a curtain is mistaken for a woman by Fuzzy and nearly forced to marry him. After the Professor is saved by the Powerpuff Girls, he writes on his notepad "Lumpkins are, above all, stupid" and as a sidenote "never speak of this again"... and then eats it. He gets really mad when the Girls mention it about 10 seconds later.
* ''WesternAnimation/TheGrimAdventuresOfBillyAndMandy'': At the end of the episode "My Fair Mandy," Mandy, Billy, and Grim are [[spoiler:turned into WesternAnimation/ThePowerpuffGirls]], sort of.
-->'''Grim:''' We keep flying, we never head back, and we never talk about this again.
* ''Franchise/{{Transformers}}'': The 2008 [=BotCon=] script reading, "'Bee in the City", ends with all parties involved agreeing to never speak of the incident again.
* ''WesternAnimation/HeyArnold'':
** Whenever Phoebe ends up involved on something involving Helga's crush on Arnold, Helga always tells her this at the end.
--->'''Helga:''' This whole thing? It never happened.\\
'''Phoebe:''' Forgetting!
** Also:
--->'''Principal Wartz:''' (''in a sombrero shaking maracas'') Are you attempting to leave the school grounds without permission, Miss Pataki?\\
'''Helga:''' Are you attempting to dance the flamenco, Principal Wartz?\\
'''Principal Wartz:''' (''beat'') This moment never happened.\\
'''Helga:''' Gotcha.
* In ''WesternAnimation/{{Recess}}'' all the group agreed this when they see Spinelli having fun dancing Hula Hula with Finster, who was babysitting her in that episode.
* In the ''WesternAnimation/JusticeLeague'' episode "This Little Piggy" we get to see how far Batman will go to save Wonder Woman [[http://www.youtube.com/watch?v=uoRundeX6O0&feature=related here]].
* ''WesternAnimation/FamilyGuy'':
** Meg gives her brother Chris advice on how to cajole their father Peter... that might work for a well-loved daughter:
--->'''Meg:''' Okay, look. Dad is really easy. All you have to do is sit on his lap, give him a big kiss on the cheek, look him right in the eye, and he's butter.
** Chris then attempts this. It does not have the intended effect.
--> '''Peter''': *beat* Chris. I'm going to stand up. Walk out of this room. And we will never speak of this again.
*** The best part of the exchange is that the tone of Peters voice makes it clear he is VERY freaked out by the whole thing.
** Also the time where Peter is blind and accidentally gets into Chris's bed at night...
** At the end of the episode where [[ItMakesSenseInContext Peter is temporarily turned gay]]:
--->'''Meg:''' [[LampshadeHanging So, this is one of those things we just never talk about again?]]
* In one crossover between ''[[WesternAnimation/TeenageMutantNinjaTurtles2003 Teenage Mutant Ninja Turtles]]'' and ''ComicBook/UsagiYojimbo'', Usagi says this when he and Leonardo put on black cloaks and infiltrate a fortress. While Usagi respects the Turtles, he doesn't really like ninjas and their "cowardly and dishonorable" ways.
* In ''WesternAnimation/ThePenguinsOfMadagascar'', ("Jiggles" episode), after Kowalski's BlobMonster spat both Kowalski and Julien out, the two were covered in green goo and draped across each other. Julien's response to the situation is, "I will not talk of this if you don't."
* ''WesternAnimation/PhineasAndFerb'':
** Buford and Baljeet agree on this after their clothes get blown off by [[CrowningMomentOfAwesome Ferb test-driving Meap's repaired spaceship]] in The Chronicles of Meap.
--->'''Buford:''' We must never speak of this again.\\
'''Baljeet:''' Agreed.
** The fireside girls first try at their "Beekeeping Patch" was clearly a bad idea, as they've agreed to never even mention it again!
** Done by Candace and Stacy in "The Klimpaloon Ultimatum" after they miss a high five.
* ''WesternAnimation/JackieChanAdventures'': Ratso on having to remove an [[MaskOfPower Oni Mask]] from Finn's rear end.
-->'''[[TheDragon Ikazuki]]:''' Well? What are you waiting for?!\\
'''Ratso:''' Uh, well, this is kinda awkward.\\
'''[[Creator/MauriceLaMarche Ikazuki]]:''' Simpleton! Do as you are told!\\
'''Finn:''' What he said.\\
'''Ratso:''' Okay! But we are ''never'' gonna bring this up again.\\
'''Chow:''' I'm not even here.
* ''WesternAnimation/DannyPhantom'': In "Reality Trip", Sam wonders how Danny convinced her parents to let her go on a cross-country trip with him and Tucker, and the explanation is thus:
-->'''Sam's Mother:''' ''(being overshadowed by Danny)'' You know I think the Fentons are wonderful, Sam should take a cross-contry trip with them.\\
(''Danny pops out of her, and overshadows Sam's father'')\\
'''Sam's Father:''' And I agree with you! Let's never speak of this again.
* In ''WesternAnimation/{{Wakfu}}'', episode "The Dragon-Pig", for not listening to [[IdiotHero Sadlygrove's]] warning, Evangelyne, Amalia and Yugo fall victims to a BalefulPolymorph [[spoiler:turning them into cute, but defenseless piglets]]. Once they regain human form, Amalia insists that this incident should never be mentioned again.
* In an episode of ''WesternAnimation/ScoobyDooMysteryIncorporated'', Fred and Daphne encounter a statue of [[TheScrappy Scrappy-Doo]], prompting Fred to tell Daphne that the gang all promised they'd never speak of him again.
* In the AllJustADream episode of ''WesternAnimation/KimPossible'', Kim saves villains Drakken and Shego from an exploding device. After Shego realizes how awkward it is, Drakken declares this trope, to which Kim replies "Fair enough".
* On ''WesternAnimation/JimmyTwoShoes'', after an episode ends on a particularly disgusting note, Jimmy and Beezy agree "This never happened."
* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'', "The Return of Harmony, Part 2": Rarity says this word for word to her friends about the fact that she was brainwashed into thinking a large boulder was a giant diamond. Of course, [[BrutalHonesty Applejack]] brings it up very shortly afterwards.
--> '''Rarity:''' How in Equestria could [Rainbow Dash] think that tiny patch of cloud is Cloudsdale? \\
'''Applejack:''' The same way [Discord] got you to think that cheap rock was a bonafide diamond. \\
'''Rarity:''' ...I thought we agreed never to speak of that again.
* ''WesternAnimation/KingOfTheHill'': Years ago, Hank, Dale and Bill "borrowed" Boomhauer's car for a joyride and droven it into a flooded quarry. The three then agreed never to mention it again. Hank had no choice but to break the agreement when the quarry was about to be drained, since they left clues linking them to the case.
* ''WesternAnimation/AvengersEarthsMightiestHeroes'': Iron Fist and Luke Cage agree not to let anyone know that they lost a battle against a bank robber who wielded Ant-Man gear.
* The ''WesternAnimation/StevenUniverse'' episode "Secret Team" has Steven, Pearl, and Amethyst creating a team in order to hide something from Garnet. After they destroyed all the monsters Pearl and Amethyst decide to never discuss it again, though Steven is attached to the concept of their "secret team" and ends up telling Garnet the secret.

->''Now let us never speak of this trope again.''