[[quoteright:227:[[Webcomic/MenageA3 http://static.tvtropes.org/pmwiki/pub/images/sayingtoomuch_menagea3_4031.png]]]]
->''I had the right to remain silent...but what I lacked was [[AlcoholInducedIdiocy the ability]].''
-->-- '''Ron White'''

Someone lets something slip that reveals plot-sensitive information to another character. Sometimes this is a pure accident, to move the plot along. Sometimes this is the result of the protagonist pulling an ExasperatedPerp.

In a non-crime-related plots, it's used to create [[PoorCommunicationKills dramatic]] or [[HilarityEnsues amusing]] conflict.

Subtropes:
* EndangeringNewsBroadcast
* INeverSaidItWasPoison
* INeverToldYouMyName
* ICanExplain
* IllNeverTellYouWhatImTellingYou
* LooseLips
* SuspiciouslySpecificDenial

Related to SpottingTheThread. May lead to a ConvictionByContradiction. Contrast TooMuchInformation, which is saying too much about ''other'' things.
----
!!Examples:

[[foldercontrol]]

[[folder:Anime and Manga]]
* ''LightNovel/OokamiSan'' gives us a moment, as well. After her bout with EasyAmnesia, Ryoko is walking home with Ringo. Ryoko informs Ringo that she doesn't remember anything from the time where she had regressed to her younger self. [[spoiler: When Ringo asks Ryoko if she's hungry, Ryoko tells her she's still full from the parfait she ate. Except she ate that parfait during the time she claims she can't remember. Ringo quickly realizes that Ryoko does indeed remember, and uses that information to blackmail her into wearing [[HairDecorations a cute little ribbon in her hair.]]]]
* In the Alabasta arc of ''Manga/OnePiece'', Igaram says aloud that the royal guard currently fighting Sir Crocodile have used a DeadlyUpgrade and will die shortly. Crocodile overhears this, and retreats to a rooftop to watch them die uselessly.
** [=CP9=] agent Fukurou, in spite of having a giant zipper over his mouth, tends to blab intel to the enemy. The mission before the Enies Lobby battle was complicated by his jabbering, and the Straw Hats were able to plan their rescue of Robin thanks to his 'hints.'
** In the Arlong Arc, Nezumi accidentally reveals that he's working for Arlong to prevent Nami from earning enough to fulfill her end of the deal to buy back her village this way. When he and some Marines come to confiscate her treasure stash and they're having trouble finding it, he yells that they're specifically looking for 100 million Berries, the amount that Nami was supposed to give to Arlong (although she is a few million short as of their arrival). Nami immediately realizes that Arlong was the one who informed them.
* Happens many, MANY times in ''Manga/DetectiveConan'', whenever the culprit is confronted.
* In the ''Franchise/AceAttorney'' manga, Turnabout Showtime features an example in which it is not revealed that the person has made a mistake until very late in the trial. Raymond Spume yells at Julie Henson for "biting her nails during the show just like (she is) now!" when pulling the murdered Flip out of his costume. It turns out that Sparklestar's (the mascot Raymond plays) back was turned to Julie while she was biting her nails, meaning that Raymond could not have seen her doing it unless [[spoiler:he was wearing his costume backwards, which would enable him to unzip it and stab Flip, who was also wearing it the same way so that he could perform a backflip the same way he did a front flip]].
* The main reason why [[Manga/FushigiYuugi the Nyan Nyan girls]] get [[ATwinkleInTheSky punched into the stratosphere]] is because none of them can keep their mouths shut and ''always'' end up saying the wrong thing in the worst moment possible.
* ''Manga/KenichiTheMightiestDisciple'' gives us Rimi, also known as the Yomi-member Atlantis. She tends to blab otherwise confidential things when she first appears, including what she's doing.
* In ''Manga/{{Bakuman}}'', Nanamine, who is working with a group of online consultants changed the first chapter even though his editor was fine by it. When Kosugi, his editor, asks about it, he says "You might have been satisfied with it, but everyone else wasn't." Kosugi then realizes what's going on and Nanamine shows him his plan.
* Played with in ''Manga/DeathNote''. L tries to get Light to mention something that only Kira would know, only for Light to know this from the start and carefully avoid saying anything. However his skill at doing this just makes L more certain that Light is Kira.
* In the ''Anime/GirlsUndPanzer'' "Little Army" manga, after Chihiro sprains her ankle, the group of herself, Miho and Hitomi needs a driver to get home. At this point, they see Emi, who is on her way home, and who starts to leave, offering to call for help. Miho then points out that, based on some of Emi's earlier statements indicating that she knows German tanks are strong and her identifying the tank type moments before, she knows much about driving a tank, and can drive. Emi sheepishly says that she "[[LampshadeHanging said something stupid like that without realizing it]]".
* In the ''[[LightNovel/HaiyoreNyarkoSan Haiyore! Nyaruani]]'' short "Cooking", [[Franchise/CthulhuMythos Nyarko]] says that the dish of the day is Cooked Whole [[SoundEffectBleep *BLEEP*]], and holds up something that's red, writhing, tentacled, and [[{{Pixellation}} pixelated]]. [[OnlySaneMan Mahiro]] [[FreakOut freaks out]], and Nyarko says this is a really hard ingredient to obtain, thanks to the [[FictionalGenevaConventions Space Washington Treaty]]...and immediately thinks to herself "Crap, I shouldn't have said that."
[[/folder]]

[[folder:Comics]]
* In ''ComicBook/GothamCentral'', as a result of having been working long hours and being generally tired and depressed, Renee Montoya accidentally lets slip to Maggie Sawyer, captain of the Major Crimes Unit, that Romy Chandler had her weapon taken by Batman after she tried to shoot him.
-->'''Marcus Driver:''' "What, you figure I should just shoot over to this Tailor's place, get myself a Batman costume? Dress up and try to make Dunning wet himself?"\\
'''Josie Mac:''' "Yeah, on second thought it's probably not such a good idea, Romy might try to bust a cap in your ass."\\
'''Renee Montoya:''' "Yeah, well, he'd have to give her weapon back, first."\\
'''Maggie Sawyer:''' "''What'' was ''that''?"\\
'''Renee Montoya:''' "[[OhCrap Oh, Hell.]]"
[[/folder]]

[[folder:Audio Play]]
* Tardust has this problem on AudioPlay/WereAlive when he demonstrates a little too much knowledge about Lizzy. This leads Riley to deduce that he was the one who [[AttemptedRape tried to rape Lizzy]] at the furniture store. This doesn't end well for Tardust.
[[/folder]]

[[folder:Film]]
* It ends up being a crucial plot point in ''Film/LAConfidential'' - [[spoiler:Capt. Dudley Smith reveals that he's the one who killed Jack Vincennes by asking Ed Exley to investigate a name Vincennes dropped as his last words - "Rollo Tomasi". Except that "Rollo Tomasi" happens to be a name made up by Exley for his father's unknown murderer; he'd told the story to Vincennes on the previous day.]]
* ''Film/MoulinRouge'' first has a heavily sarcastic version:
-->'''Nini:''' (to the Duke) I don't like this ending. Why on earth would she go with the penniless writer? Oops! I mean ''sitar player''.
** The second one comes as a response to this:
-->'''The Duke:'''' Why shouldn't the courtesan marry the maharajah?\\
'''Christian:''' ''Because she doesn't love you!'' ...him. She--she doesn't love him.
:: The first example is a deliberate leak, while the second is accidental.
* In ''TwoDaysInTheValley'', Teri Hatcher has hired killers to murder her husband. One of the police detectives notices that she says, "They killed my husband," implying that there were multiple murderers when the police hadn't established this fact yet. His partner brushes it off as a figure of speech.
* Several instances in ''Film/MysteryTeam''
-->"I wish they'd all disappear like the lost colony of Roanoke. But they'd probably go, 'What's Roanoke?' And I'd go, 'Shut up, Caleb. '"
-->"Following your dreams is never stupid, unless you dream about water and then you pee the bed last Thursday."
-->"Forensic pathologists study the dead. Goths dress like the dead and date closeted gay guys named Ember."
-->"We won't tell the police." "Oh man, now you sound like Dad."
* Parodied in ''Film/CasinoRoyale1967''. Mata Bond is looking for information on Le Chiffre:
-->'''Frau Hoffner''': Come along, child. The auction is about to begin.
-->'''Mata Bond''': Auction?
-->'''Frau Hoffner''': Tonight we are selling one of the finest art collections in Europe.
-->'''Mata Bond''': Le Chiffre's collection?
-->'''Frau Hoffner''': Who?
-->'''Mata Bond''': Le Chiffre.
-->'''Frau Hoffner''': Who is Le Chiffre?
-->'''Mata Bond''': The man who owns the collection.
-->'''Frau Hoffner''': What collection?
-->'''Mata Bond''': The collection that's about to be auctioned.
-->'''Frau Hoffner''': Who said anything about an auction?
-->'''Mata Bond''': You did.
-->'''Frau Hoffner''': Who am ''I''?
-->'''Mata Bond''': Frau Hoffner.
-->'''Frau Hoffner''': Never heard of her. You are insane, my child, quite insane.
-->'''Mata Bond''': I think she's right!
* The Djinn in the first ''Film/{{Wishmaster}}'' film disguises himself as a friend of Alexandra, and comments that Alex's boss would really like her apartment. Alex notes that she never mentioned who she worked for. The Djinn manages to talk his way out of it.
* In ''Film/KissTheGirls'', Kate first starts to suspect that she's alone with the killer when he knows where her colander is without being told. He then proceeds to discuss in detail what kind of information a bad guy could get by going through her trash, before finally dropping pretense altogether to tell her exactly what he discovered when he went through her trash.
* In ''WesternAnimation/TheBookOfLife'', after [[spoiler: La Muerte discovers that Xibalba cheated to win their wager]], he puts himself in even deeper hot water when he accidentally reveals that [[spoiler: he gave the Medal of Everlasting Life to Joaquin]]. ''Whoops''.
* In ''Film/{{Annie 2014}}'', Grace ''absolutely'' has friends and under ''no'' circumstances [[spoiler:is in love with Mr. Stacks.]]
* ''Film/StarTrekIITheWrathOfKhan'': Chekov unintentionally informs Khan that the Reliant wasn't look for him, and they had in fact assumed they were on a different planet. It takes several minutes for Khan to [[SpottingTheThread realise this]], but when he does, things rapidly go downhill for Chekov and his captain.
[[/folder]]

[[folder:Literature]]
* In Creator/IsaacAsimov's story ''Galley Slave'' a professor sues US Robotics, accusing a proofreading robot of altering his work. When the robot testifies, the professor blurts out "Damn you, you were instructed to keep your mouth shut about..." Oops. [[spoiler: He had made the changes himself, then brought the case to make a point against automation.]]
** The ''real'' twist is that [[spoiler: the robot wasn't going to tell the truth anyway, since the First Law (manifested as a desire to protect the professor's reputation) trumped the fact that it would be scrapped if it didn't speak out (Third Law), as well as the order to be quiet (Second Law). The only reason for US Robotics' lawyer to call the robot to testify was in order to trick the professor, who distrusted robots and was deliberately ignorant of how they worked, into making that slip, by providing the robot with a higher-level First Law trigger that trumped the initial one.]]
* ''Literature/HarryPotter''
** Poor Hagrid is prone to this, especially when he's distraught or talking to the PowerTrio. He lets slip the means to calm FluffyTheTerrible, the name of a warlock who helps immensely with a search he doesn't want them to succeed in, and several other pieces of relevant information over the course of the books. Often {{lampshade|Hanging}}d by Hagrid himself immediately after: 'I shouldn't have said that'.
** It's also how Harry discovers the imposter in ''Literature/HarryPotterAndTheGobletOfFire''.
* Moist von Lipwig fell into this trope in ''Discworld/MakingMoney'' when he was attempting to talk his way around Captain Carrot's ExasperatedPerp tactic by telling Carrot that he knows what he's trying to do to him. Carrot then promptly thanked him... for informing him that he's quite familiar with that tactic and thus implying his rather shady criminal past. Whoops!
* In ''Literature/TheDiamondAge'', Inspector Chang returns Hackworth's top hat, saying that he got it from a suspect. Hackworth thanks Chang for having "arrested him" despite Chang not having mentioned anyone being arrested, inadvertently admitting that the hat was stolen from him. He had wanted to keep the theft a secret, because the thieves had also stolen from him an illegal copy of the Primer that he had made.
* ''Literature/AmericaTheBook'' has [[FootnoteFever a footnote]] listing countries where the U.S. has carried out secret/illegal military operations, ending with "{{Cana|daEh}}-... we've said too much."
* In almost every ''Literature/EncyclopediaBrown'' story involving Bugs Meanie, this sort of thing gave Bugs away; he usually had to defend a lie with another lie that made what he said earlier contradictory.
* In the ''Literature/CommonwealthSaga'' short story "The Demon Trap", Paula Myo is investigating a terrorist who has not only had his memories wiped, but a completely different set of memories implanted, but still proves his involvement because of a DNA match at the scene, and a mismatch where the person whose memories he has was sick. The head of the political party with the same aims as the terrorist group denies any involvement, but decries punishing a man for a crime his current personality didn't commit. In the process he [[spoiler: describes the stewardess in sufficient detail to convince Myo that he provided the fake memories. It eventually transpires the entire movement consists of genetically-altered clones with a HiveMind]].
* In DouglasHulick's first novel, ''AmongThieves'', the main character, Drothe has been tracking down a powerful book that's been rumored about, but which nobody has much information on, for his boss, Kells. Eventually he finds it, but when Kells asks what he's found, he tells his boss that he's not going to give him any information about "that damned journal" until Kells tells him what's going on. Kells realizes he's found the book, as everyone else has just been calling it "the book": nobody else knew it was a journal specifically.
* In ''Literature/DaughterOfTheLioness'', Aly is keenly aware of this trope and tries very hard not to fall into it, which is difficult when Dove and Sarai are specifically asking for stories about legendary Tortallan figures who are part of Aly's family, like [[Literature/SongOfTheLioness her mom]] and [[Literature/TheImmortals Daine the Wildmage]]. She also has to work hard to avoid sounding as well-educated and astute as she really is, but [[TheSmartGuy Dove]] still notices every time Aly slips up.
[[/folder]]

[[folder:Live Action Television]]
* From ''Series/{{Angel}}'' 5.15 "Shells":
-->'''[[spoiler:Knox]]:''' I don't just care about Fred - I practically worship it.
-->'''Gunn''': You said "it".
-->'''[[spoiler:Knox]]''': What?
-->'''Gunn''': "Not "her". You said "'I worship ''it''".
-->'''[[spoiler:Knox]]''' (smirking): Oops.
** In this context, "it" refers to [[spoiler:the goddess Illyria, about to be reborn via the sacrifice of our beloved Fred. Fred is the "her". In this case, Knox believes that only Fred was worthy to be Illyria's host.]]
* ''Series/BuffyTheVampireSlayer'': In the final episodes of season 4, Spike, using "[[YokoOhNo the Yoko Factor]]," has successfully turned Buffy and the Scoobies against one another by exploiting the existing tensions within the group. In the next episode, Spike, having realized that he gave the information necessary for Adam's plan to Willow, and now Willow won't be speaking to Buffy, meets up with Buffy and tells her that just because they had a falling out doesn't mean they can't focus on decoding the info; as Spike wasn't around to see their falling out, Buffy puts two and two together and realizes that Spike set them up.
* Whenever Creator/StephenColbert gets carried away in a rant and forgets he's not supposed to be talking about himself. On how ''Film/HighSchoolMusical'' could be made [[SlidingScaleOfIdealismVersusCynicism more realistic]]:
-->'''Stephen:''' If [the main character] went anywhere near the theater department, the football team wouldn't join him in a peppy dance number! They'd string him up on a goalpost by the tights of his home-made Romeo costume, and chuck stale Tater Tots at his head until I wet my pants! - ''his'' pants, ''his'' pants!
** Another example, after 'Papa Bear' Bill O'Reilly appeared on his show, Colbert showed a clip of ''Series/TheOReillyFactor'' the next day where Bill says "Colbert ''blew'' me right away." Cue rant from Colbert how this was supposed to remain secret, how heartless O'Reilly was and it wasn't right away, they had dinner first. He goes onto his next segment where he uses the same phrase and realizes what Bill meant.
-->'''Stephen:''' Oh, my. I have misjudged him. And perhaps said too much.
** This was common when he was on ''Series/TheDailyShow'', too. Several installments of "Even Stevphen" ended with him and Steve Carell having turned the topical "debate" of the day into a thinly-veiled or not-at-all-veiled discussion of their personal lives.
-->'''Steve:''' ''[on why Elian Gonzalez shouldn't go back to Cuba]'' Well, isn't it obvious, Stephen? A delicate boy like that shouldn't be with his father. I mean, think about it. If he goes there and lives with his father, you know what he's gonna hear. [[WhenYouComingHomeDad "No, Elian, Daddy can't go camping this summer, things are just too crazy at work,"]] or, [[BillyElliotPlot "No son of mine is going to take pottery class,"]] or, [[WhyCouldntYouBeDifferent "Why aren't you tougher? You get beat up in school, you fight back! You don't go crying to the principal like a wussy little girl! Suck it up! Suck it up! Suck it up]], [[FreudianSlip Steve!"]]
* ''Series/ThirtyRock'':
-->'''Jack''': Lemon, we have a problem.\\
'''Liz''': I have this whole Tracy-Josh thing under control!\\
'''Jack''': What are you talking about?
* In ''Series/RedDwarf'', Lister is reading Rimmer's diary to the Cat. Rimmer is outraged by this betrayal of privacy, and Lister tries to mollify him by saying he can read Lister's diary if he wants.
-->'''Rimmer''': Why would I want to read ''your'' diary? It's full of puerile nonsense about Kochanski.\\
'''Lister''': Ah, so you ''have'' read my diary.
* ''Series/LawAndOrderUK'': During the prosecution of an accused rapist/murderer, the key witness is a young woman who saw the man lurking around the building where the crime took place (she may very well have been the intended victim had she not evaded him). The man denies it, angrily accusing the girl of lying and referring to her tattoos before covering his mouth in horror as he realizes his mistake. Although the girl's arms were indeed covered with tattoos, she was wearing a jacket while in court. The only way he could have known about her tattoos was if he had seen her previously.
* Cuddy intentionally says too much to Wilson in an episode of ''Series/{{House}}''. She and House kiss, after which Wilson tries to trick her into confessing by asking her if everything's alright in a sort of leading tone of voice. She sees through the ruse and has no intention of denying the incident.
-->'''Cuddy''': Everything's fine with my kissing House, oh God, you dragged it out of me, you're a genius.
* ''Series/{{Supernatural}}'' - [[OurAngelsAreDifferent Castiel]] eavesdrops on Dean, Sam and Bobby arguing about their suspicions that he's working with Crowley (he is). Bobby suggests that if there's any chance they're dealing with "a Superman who's gone dark side", it's a good time to stock up on Kryptonite. Later, after Castiel convinces them they were wrong about him, he makes one fatal mistake.
-->'''Castiel:''' It is a little absurd, though. Superman going to the dark side...
* On ''Series/{{Community}}'', Troy has a tendency to do this, adding "Whoops" without changing the tone.
-->'''Troy''': How do you know it was our design? We submitted in anonymously. Whoops.
* In ''Series/{{Castle}}'''s pilot, the brother of one of the victims, when asked about an alibi, provides alibis for the three murders. Castle feels downhearted, but Beckett points out that, while it is possible he'd know his alibi for his sister's death, the fact that he was prepared for ''all three murders'' is quite suspicious. [[spoiler:He did it.]]
* ''Series/DoctorWho'':
** In the serial "The Time Meddler", the Doctor has disappeared in 1066, and in order to find him Steven interrogates a suspicious monk who swears up and down he hasn't seen him. Steven asks the Monk kindly to keep an eye out for him and asks "Do you remember the description I gave you?" to which the Monk responds by listing off the Doctor's physical traits - long white hair, a walking stick, and [[AwesomeAnachronisticApparel strange-looking]] clothes. Steven leaves to tell Vicki that he's confirmed the Monk has seen him, as he never gave him a physical description.
** In incomplete episode "Shada", Chronotis blurts out his real identity (the extremely powerful and dangerous Time Lord outlaw Salvayin, who is [[MacGuffin being sought by the villain as a vital component to his plan]]) in a sudden slip of the tongue at the exact point when the villain thinks Salvayin is gone forever, is patching things up with the Doctor and is just about to give up on his plan and go home - basically, the ''worst'' possible time. Since this is a case of the character having his brains splattered across the wall by the IdiotBall (as he'd kept his identity a secret for over 700 years until then), the novelisation alters this to have the companion figure it out and announce it to the Doctor (and the villain, who he is comforting after a VillainousBreakdown), thinking Salvayin is a danger to the Doctor and not realising that Salvayin being alive is crucial to the villain's plan, and plays it for excruciating DramaticIrony.
** In the episode "The Unicorn and the Wasp", the Doctor is trying to solve a murder mystery, and accusing everyone in the room about certain facts that could point towards them being the killer. He points to one man who is wheelchair bound. Who in turn cracks under the pressure and admits that he can walk and was only faking being paralyzed, afraid that that was the only thing holding his marriage together. The Doctor then admits he wasn't actually going to confront him about anything.
* In ''Series/YesPrimeMinister'', Sir Humphrey has a tendency to manipulate Prime Minister Hacker for his own self-serving ends, but on one occasion tries to prevent him from appointing a reformer to the position of Chairman of the Bank of England in order to prevent a massive scandal that would destroy Hacker's government. For once, Humphrey is genuinely looking out for Hacker's best interests, but when Hacker finds himself in yet another awkward situation thanks to Humphrey, he furiously confronts Humphrey, leading to this exchange:
-->'''Hacker:''' I don't understand it, Humphrey. What's your game? Why should you be adamant that I allow another cover-up? What's in it for you?\\
'''Humphrey:''' ''[Urgent]'' Nothing, Prime Minister! I assure you, I have no private ulterior motive. I'm trying to protect you from yourself. I'm entirely on your side.\\
'''Dorothy:''' How can we believe that?\\
'''Humphrey:''' Because this time ''it's true!'' ''[Hacker raises an eyebrow; Humphrey realises what he's said]'' I mean... this time I'm ''particularly'' on your side.
[[/folder]]

[[folder:Video Games]]
* Near the end of ''VideoGame/{{Persona 4}}'', after [[spoiler:guessing out the identity of the killer]], the Investigation Team go to the hospital to interrogate him. While he initially tries to give off some basic and non-specific answers, the continued grilling from the team (and Detective Dojima) gets him to blurt out:
-->[[spoiler:'''Tohru Adachi''']]: [[spoiler:"Namatame was the one who threw them in!"]]
** The funniest part about this: [[spoiler:[[{{Irony}} He spent most of the game pretending to do this in order to manipulate the investigation team]], [[HoistByHisOwnPetard only to be exposed when he does it for real, thereby exposing that he knew the method by which the people were being killed, and the existence of the TV world]].]]
** The ''real'' kicker is that [[spoiler: he subverts it earlier on. When Naoto finds Nametame's journal, he remarks on the names of all the victims being in it. Adachi agrees and says that it proves Nametame is the culprit... except Naoto explicitly mentions that it has the names of those people who were abducted, but not killed and therefore weren't part of the investigation, meaning Adachi should have been asking them why in the blue hell Nametame would even know who they are.]]
* In the case "Recipe for Turnabout" in ''VisualNovel/PhoenixWrightAceAttorney: Trials and Tribulations'', [[spoiler:the case is won by BluffingTheMurderer, causing the suspect in question to call you on it and revealing information he shouldn't have been aware of.]]
** This happens a lot in the series. Usually it's the INeverSaidItWasPoison variety.
* ''VideoGame/InThe1stDegree''. If you play the game right, Tobin will end up blurting out information that makes him guilty right there in the courtroom.
* In ''VideoGame/{{Catherine}}'' [[spoiler: Thomas Mutton]] assumes that [[spoiler: Vincent has figured him out]] and accidentally confesses [[spoiler: his involvement]] when he was never under suspicion in the first place.
* Occurs in ''VideoGame/SuikodenV'' after the battle between Barows' army, Godwin's army, and the Armes army. [[spoiler:Salum Barows]] feigns ignorance about Armes being there even though he arranged for them to be there. Then, [[spoiler:Euram Barows]] runs in and practically confesses that they were working with them. Then, he goes a bit further by suggesting [[spoiler:using the Dawn Rune which up until then had been thought to be in the hands of the village of Lordlake.]]
* In ''VideoGame/PrinceOfPersiaTheTwoThrones'', the Prince, obsessed with finding and killing the Vizier, hears a woman scream, and heeds the advice of his dark half to keep going. Farah asks him if he heard it and he says that they should continue, because he is "sure she will be all right." Naturally, Farah realized he heard and is [[WhatTheHellHero outraged]], resulting in him going to save the women in the brothel.
* In ''VideoGame/LANoire'' we get Jean Archer who can't seem to help but give information by mistake in the case appropriately titled "A Slip of the Tongue".
* At the start of ''VideoGame/AzureStrikerGunvolt'', Gunvolt is receiving a mix of ElectricTorture and ATasteOfTheLash. The torturer, convinced Gunvolt has no chance of escape, tells him the Muse, whom Gunvolt was looking for, is aboard a freight train. Turns out Gunvolt [[ShockAndAwe has electricity powers]] and the torture actually helped him recharge his energy. He then escapes with extra knowledge of where to look for the girl.
* In ''VisualNovel/{{Demonbane}}'', Ennea at first appears to be an ordinary girl, but accidentally outs herself as a sorceress with this exchange:
-->'''Ennea''': Hahaha! It's so rare to see [[BelligerentSexualTension such a relationship]] between a mage and his grimoire!
-->''[[{{Beat}} *long silence*]]''
-->'''Ennea''': Oh... oops.
[[/folder]]

[[folder: Web Animation]]
* In ''WebAnimation/{{RWBY}}'', after an intense shouting match between Weiss and Blake, they have this exchange:
-->'''Weiss''': You want to know why I despise the [[WesternTerrorists White Fang]]? It's because they're a bunch of liars, thieves, and murderers!
-->'''Blake''': [[WhamLine Well, maybe we were just tired of being pushed around!]]
[[/folder]]

[[folder:Webcomics]]
* The second variation was seen in ''Webcomic/{{Narbonic}}'', when Helen was preparing to tell Dave [[spoiler:that he's a latent mad genius]].
-->'''Helen:''' There's something I have to discuss with you... Artie made me promise.
-->'''Dave:''' Uh-oh... is this about the sentient meme that took over the net in Blue Sector and keeps threatening to vaporize us via spy satellite?
-->'''Helen:''' No, this isn't about the sentient meme! I didn't even know there ''was'' a sentient meme!
-->'''Dave:''' Oh. Good.
-->'''Helen:''' On second thought, let's make this about the sentient meme.
* ''Webcomic/ElGoonishShive'' presents: "[[MrExposition an ENDLESS BARREL of exposition]]" [[http://www.egscomics.com/?date=2002-05-27 spills it]].
** When Susan starts PullingTheThread of [[ManipulativeBastard Tom]]'s web of lies, she eventually gets him to the point where he yells out "[[http://www.egscomics.com/index.php?id=1792 I am a FANTASTIC liar!]]"
* ''Webcomic/MenageA3'':
** When Zii breaks one of Gary's most prized Transformers and learns that it was a highly rare [[http://en.wikipedia.org/wiki/Overlord_%28Transformers%29#Toys Overlord]], she tries to pin it on a cleaning woman she made up: "Tragic, I know. Poor Overlord... never knew what hit him!" Gary than asks how did she know it was an Overlord.
** Later, [[http://www.ma3comic.com/strips-ma3/shut_up_kiley Kiley's attempts to reassure Gary about his sexual performance soon have her telling herself to shut up.]] She does tend to turn into a MotorMouth when under stress.
* In ''Webcomic/KidRadd'', Captain QB, after meeting with Crystal in a room they think is soundproof to discuss [[spoiler:killing Radd]], sees Sheena on the way out and asks if she heard any of it. Sheena responds that "like your friend said," the room is soundproof. Thankfully, since QB isn't too bright, he never suspects anything, enabling Sheena to leave without incident and help save Radd.
* Sisko in ''Webcomic/DAndDS9'' [[HonorBeforeReason informs the DM]] that [[FailedASpotCheck he (the DM) didn't realize]] he rolled a CriticalHit, unaware that the DM plans to [[RailRoading railroad him into]] [[DarkAndTroubledPast a Dark backstory.]]
* In ''Webcomic/GeneralProtectionFault'', after being shown the diary detailing her plans, Trudy launches into a rant about how Ki shouldn't have been able to find it, before stopping herself and asking if she had been "saying something incriminating." The damage has been done, though, and Nick no longer trusts her.
* [[http://phillymont.deviantart.com/art/Take-the-Blame-205684130 This]] ''Manga/DeathNote'' fan comic.
* In ''Webcomic/BetweenFailures'', to get Nina off her badgering about starting a relationship with Thomas, Carol tries to change the subject to Nina's ''Literature/HarryPotter'' FanFic. However, Carol forgot that Nina had only sent it ''to'' Thomas - Nina quickly [[http://betweenfailures.com/comics1/1012-math figures out]] that this means that the two already started going out. In a way, this works out, as Nina moves on from trying to get Carol to start dating Thomas to begging for info about their relationship.
* ''Webcomic/StickyDillyBuns'': Ruby [[SourPrudes doesn't want to admit that she has a libido]] (and the stress of the denial is pretty clearly getting to her), but Dillon manages to draw her into discussion of the book of {{yaoi}} manga which she recently gave him. [[http://www.stickydillybuns.com/strips-sdb/you_can_really_feel_the_attraction She soon lets slip enough to show that she has been reading it]].
[[/folder]]

[[folder:Western Animation]]
* ''WesternAnimation/TheSimpsons'':
** "I'm sorry, I can't divulge any information about that customer's secret, illegal account. [hangs up phone] Oh, crap, I shouldn't have said he was a customer. Oh, crap! I shouldn't have said it was a secret. Oh, ''crap''! I ''certainly'' shouldn't have said it was illegal! Oh, it's too hot today."
** From the episode "Wedding for Disaster":
-->'''Parson:''' I remember when she [Helen Lovejoy] used to be Helen Schartzbaum. Heck, I even remember when she was Harold Schartzbaum!
-->'''Rev. Lovejoy:''' What?
-->'''Parson:''' Perhaps I've said too much.
* WesternAnimation/BeavisAndButtHead had this happen a couple of times.
** On one occasion, they get a HotLibrarian to write a school report for them, and end up getting detention from [[HippieTeacher David Van Driessen]] when they let slip that the librarian wrote the paper.
** Another instance had our heroes being tried in juvenile court for egging Tom Anderson's house. Butt-Head tries to discredit Anderson's testimony by claiming that his vision wasn't strong enough to see exactly who threw the rotten eggs, pointing out that it could as easily have been Stewart Stevenson. The prosecutor then asks how Butt-Head could have known the eggs were rotten, unless he was the one that threw them. Oops.
* In ''WesternAnimation/BatmanBeyond'', this is how Terry [=McGinnis=] almost immediately proves that [[spoiler:Willie Watt]] is responsible for the strange occurrences at their high school.
* In the ''WesternAnimation/AdventureTime'' episode "BMO Noire", Beemo is playing at being a hard-boiled private investigator while trying to find Finn's missing sock. At one point he asks Lorraine the chicken about the missing sock, and Lorraine "blabs" that she knows that it was Finn's sock that was stolen before BMO mentioned it.
* In the ''WesternAnimation/TeenTitansGo'' episode "Staring at the Future", Cyborg casually informs Nightwing (Robin's future self) that he is building a time machine in order to get him and Beast Boy back from their "BadFuture". Nightwing, who likes how things are, disagrees and calls his fellow ex-teammates in order to stop them.
* In the ''WesternAnimation/{{Rugrats}}'' episode "The Trial", the babies hold a trial to figure out who broke Tommy's clown lamp. When Tommy notices something wrong with Angelica's alibi, she admits that she did indeed break the lamp and boasts that there's nothing the babies can do about because they can't talk. However, Angelica forgets that Didi and Betty were in the kitchen ''and heard the whole thing''.
-->'''Angelica:''' That's right: I did it! I did it! I ''DID IT!''\\
'''Didi:''' ''ANGELICA PICKLES!''\\
'''Angelica:''' [[OhCrap Oops.]] I didn't do it!\\
'''Betty:''' We heard the ''whole'' thing, Angelica.\\
'''Didi:''' So, ''you'' broke the lamp.
* The Eighties version of ''WesternAnimation/AlvinAndTheChipmunks'' had Alvin do this twice in one episode. He has a basketball game coming up, but he won't be allowed to play if he doesn't turn in his book report. He falls asleep and never gets it done, so he plagiarizes one of Simon's and turns that in. Saying Too Much one occurs when the teacher is praising Alvin for his report and asks if he had an interest in the sport. Alvin confirms his love for basketball, but the book report was about a tennis player. She sends him to school court for judgment, but he's overjoyed to find out that Simon is the judge...until Saying Too Much two occurs when he lets it slip that he copied Simon's old book report. Now that Simon knows he's guilty, he has to step down and let them find a new judge.
[[/folder]]

[[folder:Real Life]]
* OJ Simpson made this mistake while discussing his polygraph test with a reporter. When asked whether he had ever taken a polygraph test, Simpson replies with an emphatic "No." He then goes on to explain how he did go to the police station, did get hooked up to the machine, and watched the needles jump whenever his victims were mentioned.
-->'''Reporter:''' It sounds like you took a polygraph.
-->'''Simpson:''' YOU DON'T KNOW ABOUT POLYGRAPHS!'
** Simpson then goes on to discuss in great detail how he took a polygraph, and why he doesn't believe it "counts" as a "real" polygraph.
* A classic riddle has you as a detective trying to determine which of three people pistol-whipped a man to death. They all know the gun used is in custody. Inevitably, the one who did it is the one who says, "[[INeverSaidItWasPoison You don't think I beat him, did you]]?"
* The case of [[WoundedGazelleGambit "Balloon Boy" and his family]] being [[http://www.youtube.com/watch?v=p6y6HA65wUg&feature=related interviewed on the news.]] "Falcon, why didn't you come when you heard us calling you?" "Because you guys said that, um, we did this for a show." [[OhCrap "ůMan."]] The next day [[TheWoobie the poor kid]] was brought onto ''The Today Show'' to be further questioned about this, and he got so nervous about getting his parents in trouble that he vomited.
* A man in Florida vanished shortly [[http://en.wikipedia.org/wiki/Abraham_Shakespeare after winning millions in the state lottery]]. The prime suspect was a woman whom he hired to manage his funds but was apparently embezzling them. After the man's body was found, she was again questioned by the police. Afterwards, she called a press conference and tearfully proclaimed her innocence, declaring that she "had been falsely accused of shooting another human being." However, the police had not revealed to anyone exactly how the man was killed.
* The Japanese organization PRIDE FC used to sell [=DVDs=] of their fights months after they'd happened with English commentary dubbed in. The commentators would pretend to be watching the fights live. This came apart during an infamous incident in which the play-by-play man forgot what was going on and began telling his partner an amusing anecdote...about the fight they were calling. Written about [[http://www.cracked.com/blog/6-outstanding-taunts-done-during-mma-fights/ here]] by Creator/{{Seanbaby}} (#4 in the list).
* A similar incident happened on ''Series/AmericanIdol''. While commenting on one of the performances, Music/PaulaAbdul accidentally gave her critique of a song which hasn't been performed yet, revealing that the judges sometimes write their critiques beforehand, based on the contestants' dress rehearsals.
* A British farmer and his son were murdered early in the reign of QueenVictoria. His daughter and a servant girl, who were wounded but survived, recognized the masked attacker as another neighbor and farmer who owed a mortgage to the victims, James Blomfield Rush, because of his portly constitution and characteristic gait. At the trial Rush declined a court-appointed lawyer and opted to [[AFoolForAClient defend himself]], calling five "witnesses" that claimed they saw the attacker the night of the murder but did not identify him as Rush. When one said that she passed "within a few feet" of the masked attacker, Rush absent-mindedly asked "Did you pass ''me'' quickly?" The jury returned a guilty verdict in ten minutes.
* The 1962 US case ''Nance v. United States'' involved a defendant accused of robbery, who [[TooDumbToLive chose to ask his own questions]] at the preliminary hearing. On cross-examination of the key witness, he asked "How do you know it was me when I had a handkerchief over my face?"
[[/folder]]
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