In a scene of Mahou Sensei Negima!, Asuna has this reaction to Makie's... reports... about Negi's "reaction" to them having to squeeze him (while naked) against a wall behind them both, while in the girls' shower, to keep his presence there a secret.
Makie: I think he just "grew". Asuna: You don't have to report that to me!
One of the few places where the translation improves on this:
Makie: Negi-kun's you-know-what is touching my you-know-where! Asuna:You don't have to report that kind of thing to me! Makie: I think his you-know-what just got you-know-whatter! Asuna:Hey! Stop making stuff up!
There is also a scene where Jack Rakan walks away and loudly says he needs to take a number 2, leaving everyone yelling in disgust. He is lying, though.
Tajima from Ookiku Furikabutte tends to do this concerning his deprived sex life and his habits on masturbation. One particular episode had him getting jumped by the other guys:
One of the players: Quiet man, there are girls on this bus! Tajima: But if I don't do it, it might explode!
Tower of God: Yeon and Ja get into a heated argument about who would be a better supporter of Viole, and it quickly devolves into this:
Yeon: "I GOT A BIGGER CHEST THAN YOU! YOU MALE STINKING APE!
Beat, everybody has white eyes of shock and Prince is laughing his ass off in the background.
Ja: Chest…? Don- Don't joke with me! You think a woman's chest is some sort of blessing? Then I, too, will… (fiddles at his fly)
Everybody (with readied weapons): DON'T!
In the Full Metal Panic!! novels, during TSR, Gauron tells Sōsuke that he fantasized dragging his dead body out of his AS and fucking it up the ass. Sōsuke is horrified, to say the least. And Gauron has the audacity to ask why he's making a face at him. It's made all the funnier by how Gauron attributes Sōsuke's worried and disgusted face to a Heroic BSOD, instead of the more obvious and immediate reason....
Lampshaded in Excel♥Saga with Aesop, who has "sporadic anal enlargement syndrome". On the toilet, writhing in agony, he shouts, "Oh, it's big!". Excel immediately runs away. Hyatt, oblivious, asks "What is big?" Excel drags her away and tells her not to ask. The toilet appears out of nowhere in the middle of a baseball field just to make this joke.
It's a well known fact in the Durarara!! universe that Shinra Kishitani is a kinky little bugger. About 90% of this can be attributed to the fact that Shinra is happy to tell anyone about whatever dirty thought comes to mind. Shizuo and Celty have both tried to beat this habit out of him. This only encourages him.
Erika Karisawa has no problem with telling her friends that she fantasizes about them having gay sex.
In Lucky Star, this is exactly what Kagami says one time in response to Konata mentioning the sweat from everyone at Comiket rising up and forming a cloud.
In the post-Infinite CrisisSecret Six mini-series, Ragdoll reveals that he's been spending his paychecks on a monkey house and a collection of little monkey outfits. Deadshot tells him not to tell them those things.
During a shopping trip, Chase Stein of the Runaways tells his girlfriend Gertrude Yorkes that he's been wearing the same six pairs of boxers over and over since they ran away the first time, to which Gert responds, "Some days, it's very hard to love you."
A much later issue sees 12-year-old Klara Prast trying to hang out with the older kids while they play Truth-or-Dare. Karolina asks Nico which of them is the best kisser. Chase tries to argue that he's the obvious choice. Nico shuts him up by loudly declaring that Karolina was, in fact, her best kiss. Things quickly go downhill from there, and by the end of it, a horrified Klara declares that she doesn't want to play with the big kids anymore.
In Death Vigil, we get this gem from Gunnar the Zombie Viking:
Sam: One at a time, men! There's plenty of bloodbath for all!
Gunnar: You talk nonsense, Samuel! There is barely enough blood here to wash my armpits!
Sam: (giving a thumbs up) Good to know, Gunnar! Gross, but good to know!
In Kyon Big Damn Hero, Koizumi explained at Kyon's request that he gained his ESP powers when both Haruhi and him were undergoing puberty. At the beginning, he found it extremely difficult separating their feelings at first, which led to highly awkward situations. Kyon realizes his mistake and declares that he never wants to clarify that.
Joey: I gotta go take a whiz. Yugi: Too much information, Joey. [...] Yugi: Well, Joey, it looks like you learned an important lesson. The only way to kill a zombie is to destroy the brain. Joey: I also learned that I'm secretly a furry. Yugi: Once again, too much information, Joey.
Rarity: That's enough! That is far more than enough!
Applejack: Ah agree with Rarity, emphatically.
Rainbow Dash: Awwwww, come on! We never talk about this stuff! We're bonding!
Fluttershy: Can't we bond over something else?
Applejack: Yeah, this is a bit much. I'd like to think you girls can always talk to me about whatever might be on yer minds... but there is some information ah really don't need. How y'all clop is definitely on that list.
Garfield just laughed at that. "That's what I love about you two. You're exact opposite but have such a strong friendship." "Friend Raven is the best girl friend that I have. She even helps me during the week of blood." Said Kory with a bit too much enthusiasm. "Too much info Kor. LA la la la." Said Garfield with his hands on his ears.
Films — Live-Action
This statement from Mean Girls: "Somebody wrote in that book that I'm lying about being a virgin, 'cuz I use super-jumbo tampons, but I can't help if I've got a heavy flow and a wide set vagina!"
Vincent: I'm gonna take a piss. Mia: That was a little bit more information than I needed Vince, but go right ahead.
From the same movie, Christopher Walken's character didn't really have to tell young Butch how his father hid the watch from the Vietcong, but decided to leave that detail intact. And mentioned it many times. Then mentioned that he hid the watch in much the same way once Butch's father passed.
In Bring It On, the following exchange occurs when Missy intercepts her brother Cliff as he's visiting the cheer squad's car wash fundraiser:
Missy: Hey, perv. Cliff: Gahhh! Missy: Hand over your fifteen bucks or get out of here. Cliff: What are you doing? Missy:Making money from guys oogling my goodies. Cliff: Aww, I didn't need to hear that. That was an overshare.
In Easy A, Olive has the following conversation with her mother:
Rosemary: I had a horrible reputation.
Rosemary: Because I slept with a whole bunch of people. Mostly guys.
We're the Millers: The American tourists the Millers can't seem to get away from are having marital problems.
Edie: I'm not as tight as I used to be. Sometimes Don just falls out. It's like throwing a hot dog down a hallway.
In Paper Moon, Addie tells Moses that Trixie is sick to keep him away from her for a while, but he wants to see her. Imogene then mentions that it's due to her period, which causes Moses to immediately back off.
Master Tang: Oh, you won't believe what happened next!
The Chosen One: No, please.
Gregory draws comic strips in Diary of a Wimpy Kid and suggests giving improvements to other peoples' behaviours; and one of them was telling people not to discuss incredibly private and personal matters in the middle of a fast food restaurant.
One of Daniel Waterhouse's relatives in Quicksilver by Neal Stephenson
Peter David is fond of doing this sort of gag in his Star Trek novels.
Morgan: A Level One diagnostic is like having a gynecological exam from head to toe. Soleta: Captain, request permission to forget what I just heard. Calhoun: Granted, and I'll join you.
Nutt, from Unseen Academicals, generally speaks in lectures, and at one point gives Ponder a taste of his own medicine. He also tells the woman he has a bit of a crush on that he is in fact staring at her arms, because they're such remarkably nice arms; this doesn't seem intended as flirting but rather a friendly compliment combined with wishing to clear up what he was doing. He also shares pertinent but wholly unnecessary details about his bodily functions, which is seen as part of his habit of being "precise but odd".
Septimus Heap: Jenna isn't all too thrilled at hearing Septimus's detailed explanation of what the "Deadly Stinking Black Slush" is.
In Island in the Sea of Time, Marian Alston is mortified when her Fiernan lover Swindapa glowingly tells her family in considerable detail just how good Alston is in bed.
The opening scene of an episode of Brothers and Sisters has virtually the entire family reveal what music they lost their virginity to (with Kevin, the gay one, asking with which sex). Nora reveals that her first time wasn't with the man she would later marry, but another guy (guess who shows up later), it was to "Pretty Woman" and it was in the back seat of his car. As she starts on the height differential and how that was dealt with, the others collectively walk out, deciding that they don't need to hear this about their own mother.
In one episode, Dr. Kelso describes how he and his crippled obese wife had sex the previous evening. Dr. Cox then suggests to the rest of of Kelso's involuntary audience that they forget about what they just heard.
A teenaged patient asks Dr Cox how he's doing, and he replies that he's recently lost the ability to process dairy, leading to Carla saying "Woah! T.M.I! Am I right, Josh? Too Much Information?" Dr Cox then tells Josh that he'll have a word with his parents "and you can chat with Nurse Early Nineties Catchphrases."
In My Family, Ben lies to Susan and then abruptly switches to the truth after she returns from a vacation.
Susan:(picking up her red dress) What happened to this? Ben: Nick was wearing it when I was trying to strangle him down the pub. (Susan looks at him) Well, I was a bit tense, you know, because Michael stole all the doorknobs and held me hostage, and Abby burned my foot in the... uh... soup. (long pause) Susan: I think I prefer it when you lie.
From the Canadian TV series Butch Patterson: Private Dick:
Blanche: Vance knew he wouldn't last a week in a maximum-security prison. Butch: You know, once you get used to the sodomy, the rest of it is pretty easy to take.
When Lennier sees Londo Mollari, who looks otherwise indistinguishable from humans, use a long tentacle that comes out of his torso to cheat at cards, he asks him about it. It leads to this infamous conversation:
Londo Mollari:[picks up a figure of the Centauri Goddess of Passion, a nude woman surrounded by tentacles] Here, the goddess Li. A synthesis of male and female Centauri. What, did you think these were for decoration? Lennier: ... I am going to take a vow of silence about this entire conversation.
Commander Ivanova also suffers from these periodically, with the best example being the time that Vir approaches her to ask what women want "when things get intimate." This leads to a very awkward discussion of Centauri sexual anatomy and practices. She also had the unenviable responsibility of of helping Delenn adjust to life as a partially-human female, and all the hygiene concerns that come along with it.
In the Star Trek: Deep Space Nine episode "Looking for Par'mach in All the Wrong Places", Bashir's reaction to Quark and the Klingon chick and then Worf and Dax's explanations of how they acquired their collections of bruises and cuts they come in to have treated at the end of the episode. The exact phrasing is more like, "I didn't really need to have that image running around in my head right now," and at the end he comments that he ''really'' needs to stop asking people what they have been doing.
iCarly: Despite the subtleties, innuendos may be lampshaded in the show time by time.
In "iCarly Awards":
Carly: You know, it's always been a dream of mine to host the iCarly Awards. Sam: Whoa, too much information! Carly: Hey, don't go there! (much later in the show) Sam: These guys take this (blows through bottle) to a whole new level. Carly:This -- will ''blow'' you away.(laughs) Sam:(shaking her head) Oh, Carly... Carly: Just watch.
It's not as explicit, but when Col. Potter assumes command of the 4077th M*A*S*H he learns more than he wants to when he's reviewing his officers. He's commended Major Houlihan, who appears to be the Only Sane Man, for her spotless record, and then moves on to the next officer...
Potter: Major Frank Burns. Margaret:Just Friends, sir. (realizing) I mean, not here, sir.
In an episode of Murphy Brown, Murphy's a few hours away from getting it on with Peter Hunt... and she goes to Eldin for advice:
Murphy: I'm a mother, for God's sake; I've got stretch marks. Eldin:Too much information! Too much information!
In the documentary Worst Jobs In History, a scientist gives the host and hapless participant, Tony Robinsonnote In a role oddly reminiscent of his role in Blackadder, an unpleasant overview of a food-taster's duties, including what would happen if the food was poisoned with arsenic. Around the time the scientist starts talking about "purging," Robinson gives in and says "that's enough."
Tying in with the Real Life medical examples below, the opening sequence of The Commish showed the title character absent-mindedly munching a pepperoni sandwich while reading a book titled Tissue Decomposition: A Homicide Primer. In the pilot episode, the protagonist squicks out an evaluation board (sent to evaluate him for a high-ranking position in another city) by nervously babbling on about the above topic while they're all having lunch.
There's an episode of Cheers where Cliff engages in slang with another mailman. Norm says "I thought about asking Cliff what he meant, but then I realized — he might tell me!"
Also, when Simon is under the influence of Alisha's pheromone manipulation:
Simon: I want to rip your clothes off and piss on your tits! Nathan: That's the kind of thing you should keep between you and your Internet Service Provider...
Half the dialogue from this show qualifies as Too Much Information. But Nathan and Kelly manage to take it to new heights in season 2, when their agent, Laura, asks to know about their previous misdemeanors so she's prepared if the media find out. Nathan proceeds to tell a horrible story about picking up a (probably heavily sedated) girl in a dentist's waiting room, having sex with her, and accidentally "tripling" himself mid-coitus (it's "when you cum, puke and shit yourself all at once")
Laura: (looking shellshocked) Anything else?
Kelly: I once shagged a monkey.
Nathan: Technically it was a gorilla.
One episode of Friends had Chandler's mom reveal on national television that she gets a craving for kung-pow chicken after sex, followed by Chandler yelling, "That's too much information!"
Tom Selleck's first episode as Richard gives us this exchange:
Monica: I am dating a man whose pool I once peed in.
Lilly: Miley, I know how he feels. I can tell by the way he looks at me! Even when I have a pimple. I never told you this, but... that's why he calls me "Lillypop". Miley: I could've gone my whole life not knowing that.
In one episode of Green Wing the majority of the cast are eating dinner at a restaurant playing a game where each of them tells the best and the worst of who they've been compared to, in terms of looks (e.g. Naughty Rachel has been compared to Lara Croft and Miss Piggy.) Statham comes in late from a telephone call and the game isn't explained very well, so he tells of his best and worst sexual encounters. The worst was with a woman who was on a very heavy period and the best was the mother of two of the characters. After he finishes there's a long pause and the conversation is moved along.
Baggage turns this into a Game Show, by having potential dates hope that their embarrassing personal secrets don't leave too much of a negative impression on a potential bachelor(ette). It's even got Jerry Springer.
A running gag in the Charmed episode "The Day the Magic Died" when the girl's father and his fiancee are visiting is that she goes on and on about their great sex life, to the point that Phoebe and Paige use the first opportunity to flee, leaving poor pregnant Piper who has to stay in bed to fend for herself.
In the Veronica Mars first season episode "The Wrath of Con", a flashback shows Veronica, Duncan, Lily and Logan playing "I Never" (someone says "I never did such-and-such", and if you have done this, you have to drink). Duncan says, "I've never seen my parents have sex." Lily has, she drinks, and begins to describe it in detail; Duncan, her brother, can't handle this, covers his ears and face and pleads for Lily to stop.
In The West Wing episode "Take Out the Trash Day", Josh tells C.J. Congress will only approve funding for teachers if they agree that in Sex Ed classes kids will be taught "abstinence only". C.J. replies, "I would not have trouble passing such a class." Josh gets an expression like he'd rather not have heard that.
Later in the episode, President Bartlett is reading a report on what should really be taught in sex education classes (which Sam has renamed "everything but"):
Mrs. Landingham: Would you like to share what's in that report, sir?
President Bartlett: With you?
Mrs. Landingham: Yes.
President Bartlett: No.
Mrs. Landingham: May I ask why not, sir?
President Bartlett: Because I'd rather not be in therapy for the rest of my life.
Then there's the second season episode "The Midterms", and this conversation between Charlie and Leo:
Charlie: Zoey and I are going out. I'll be on my pager.
The more socially awkward characters in The Big Bang Theory tend to have this problem. Sheldon has a habit of discussing his bathroom habits, Leonard's mom freely discusses her sex life (and also calls her bathroom breaks), and pretty much everything that comes out of Amy Farrah Fowler's mouth.
In Weird Al's song, "Trapped in the Drive-thru", the husband's voice reminds the voice box lady of a guy named Paul she cheated Geometry test answers off of last year. The husband replies and talks another Paul he knew. Paul was his plumber, who is bald, has a bladder problem, and has a toe infection. The voice box lady says, "Mr, please! You can stop right there! That's more than I needed to know!" Yes, this is a song!
Toshi doing an MC for X Japan at the Wiltern in Los Angeles: "We've gained a lot, but we've lost a lot too. We've been fucked and we've been sucked."
The Police song "Too Much Information", oddly enough, is a subversion of this trope - it's about someone who simply has too much knowledge in their brain.
Likewise the case for Duran Duran's "Too Much Information", as it is really about the effect of media bombardment.
Runescape gave us this (paraphrased) example during one of the quests:
Player Character: How do you "accidentally" trip and carve half a map into someone's wooden leg? Captain Donnie: Well, I was drinking rubbing alcohol mixed with gunpowder and cinnamon when... Player Character: I'm leaving now.
In the third Phoenix Wright: Ace Attorney game, Mr. Grossberg's "gut feelings" about how the case is going come from a lot lower than his gut. And he tells you about it every five minutes. It's his hemorrhoids. After the case, Mia asks him to stop talking about them.
Captain Qwark: I thought we agreed to put that jungle business behind us! Skrunch: [MONKEY NOISE] Qwark: It was mating season! How could I have known she was your sister? (notices Ratchet and Clank, laughs nervously) Qwark: How long have you two been standing there? Clank: Too long.
Shepard says this to Thane when he's describing the drell race's ability to perfectly recall any memory.
Thane: Thinking about a moment brings back the smell of cut grass, the warmth of another hand on yours, the taste of another's tongue in your mouth. Wouldn't you rather lose yourself in such a memory, rather than spend a night alone?
Shepard: Isn't that a rather personal memory to talk about?
Eve complains that she really gets upset when Mordin, discussing her treatment, starts rambling on about the many ways she could die horribly.
Dragon Age II has a conversation where Anders and Isabela realize that they were once part of the same orgy in the first game's brothel. Hawke or Varric will cut the conversation short when Isabela mentions Anders' "electricity thing".
Hawke also walks in on Isabela exiting her appointment with Anders (who runs a clinic) for STD treatment.
Alternately, Hawke can walk in on Anders treating Seneschal Bran for an STD he is implied to have caught from Isabella. This only happens if the player has previously gone to Fenris' house and overheard him talking to Isabella about not having to pay property taxes.
In one banter between Isabela and Aveline when asking about Aveline's new husband, Isabela is either providing a glimpse at her rather odd attitude to sex, or pulls a rather mean prank on Aveline:
Aveline: [sighs] Just get it out of your system...
Isabella: Did he curl your toes? Dwarf your beard? Arl your Emonnote Arl Emon is a major NPC in the first game.? Shank your Jorynote Ser Jory ends up getting shanked in Dragon Age? Praise your Makernote "Praise the Maker" is the local form of "Thank God"? Grope your grinder? Established his canon? Dampen your Divinenote The Divine is the female Pope of the Chantry? Grey your Wardennote The Grey Wardens are an Order of warriors? Pamper your Paragonnote The deified ancestors of the dwarves? Float your Frigate? How about: Satisfy a demand of your Qunnote A divine order of the world worshiped and obeyed by the Qunari without question? Or did he cup your Joiningnote The Joining ceremony of the Gey Warden involves drinking from a cup? Or did he master your Taintnote A magical disease spread by monsters? That's an old one.
Aveline: Yes, alright! He's an incredibly proficient lover. Happy?
Magnus inquiring why Pit goes in the hot springs fully dressed.
Pit: The angel's code of conduct says I must always be ready for duty! Magnus: Guess you wouldn't be an angel if you didn't do things by the book. Pit: Yeah. And, I don't want to steam the sacred buns... Magnus:We're done talking about this.
Arlon tells Pit and Palutena that he will gird his loins for their arrival. Pit is noticeably disturbed.
Pit: TMI! Nobody wants to hear about your loins!
In Borderlands, most characters have a subtitle that describes a little about them, like Mordecai "The Hunter" or Marcus Kinkaid (No Refunds!). Guess what boss character Nine-Toes' title is? "Also, he has three balls." Yeah, we really didn't need to know that.
Then in Borderlands 2 a conversation can be heard in the Crimson Raider base between the original vault hunters:
Lilith:(talking to Roland) If you die, I'm going to be really pissed! Roland: Noted... Lilith: ...And if you live, I'm tearing those clothes right off your body. Roland: Also noted. Mordecai: Eegh, Lilith. Nobody wants to hear that! Brick:(lewdly) Go on...
Avatar: Gaius, I am SO sorry about earlier! I had no idea you were in the bath...
Gaius: Aw, no worries. At least I hadn't taken off my smallclothes yet, eh? Er, but I did want to mention I'm usually in much better shape. With the stress of this blasted war, I've been eatin' more sweets than usual. Usually I'm a real piece of eye candy. Belly like a washboard, glutes like a lumberja—
Avatar: Okay, then!
Banjo-Tooie: After beating Canary Mary in a minecart race, Mary rewards Banjo and Kazooie with a Jiggy, stating that it was wedged under her wing for days, much to Kazooie's disgust. Later, when they win a rematch and win a Cheato page, Mary begins to say where it was wedged in, and Kazooie promptly shuts her up.
Metal Gear Solid 4: Guns of the Patriots has Snake's Codec call to Otacon while hiding in a trash can/dumpster. When Otacon asks Snake how he knows how it is where the household dumps their waste, Snake explains in full, such as it smelling bad from last nights leftovers from dinner, as well as bugs crawling around his face, apparently roaches, a lot of them, as well as something crawling up his leg, leaving Otacon completely grossed out by the end. When questioned by Otacon whether he even feels sick from this, Snake mentions that he's perfectly willing to even crawl into a toilet as long as it at least allows him to hide from the enemy effectively.
"Thank you. You put me in the happy position of realizing that I really don't want to know...yet spared me the burden of knowing exactly why."
This strip in Schlock Mercenary, where the narrator keeps changing the scene because everybody are talking about things you REALLY don't want to hear about. Finally, he ends up with Schlock explaining the inner workings of Carboscilicate Amorph Reproduction to Admiral Breya—or rather, him wrapping up such an explanation. The narrator comments: "That was either too much, or too little information. Either way, it's disturbing." The last one was arguably too little information. It turns out not to be disgusting at all—just a bit creepy.
There's also this strip from General Protection Fault where Uncle Wisebottom is telling Nick about the physical side-effects of the Inventor's Gene (Read: Science-Related Memetic Disorder), and mentions the effect it may have on the sex-life. Noticing Nick and Ki's facial expressions, he archly comments "So… which is more embarrassing: Me talking about YOUR future sex-life, or the thought of ME having sex?"
Likewise, the prequel book Start of Darkness includes a scene where the still-human Xykon is telling Redcloak and his brother Right-Eye that he needs to "drain some charges from the wand" because these days his prostate is "the size of a baby's head". Redcloak (and the reader) really, really didn't need that mental picture.
Questionable Content breathes this trope. Nothing is spared the characters, not even their parents' sex life.
Aeris's reaction to Leo explaining the problems with being a Tauren in VG Cats:
Aeris:I don't need to know these things!
In Misfile, Ash's father sometimes indulges in this, being the local gynecologist and only remembering women by their… parts…
The title room of Adventures in Aaron's Room is actually wired with a TMI alert, which is Aaron's pre-recorded voice shouting "T-M-I!!" repeatedly, whenever the sensors pick up someone saying a bit more than they should have. They're still working out the bugs.
In this (warning! spoilers) strip of Wapsi Square, Justin goes into a little too much detail about something that a previous girlfriend had him do.
Slightly lighter note: Monica's catching up with an old friend and makes the mistake of asking him about a nickname he's acquired.
Eerie Cuties occasionally have things like this. When Mrs. Delacroix, with a nostalgic blush, mentions her... fond memories of Chloe's mother, following by a mass Jaw Drop and Brooke covering Nina's ears. For that matter, Chloe's mother, as an adult succubus, can give a lot of qualified good advice — even hints on which make Chloe's face a little off.
Adora: ...can be used as a fun grown-up game for your... uh...
"Ahh." He smiled, creasing into a grin. "What a woman yer nan was, boy." "Okay, that's already told me way more than I wanted to know about that part."
A regular problem with Team Kimba in the Whateley Universe, usually due to Generator wanting to talk about her relationship with Thuban. Who's mutating into a dragon.
Oddly enough, it's the least sexual romantic relationship compared to the other 5 original characters and their characters....
The fact that her mutation has stunted her growth and left her with the physique of a ten year-old boy, probably has something to do with it.
Ultra Fast Pony, multiple times. In two separate episodes, Rarity creeps out Twilight or her own backing choir by describing her fantasies about Prince Blueblood (leather outfits, torture chambers, and branding irons are involved). In "Random Eye Magic", Twilight's activities during Winter Wrap Up are completely innocuous, but she accidentally describes them in the worst possible way, so Applejack announces she'd rather not know. In "Shameless Self Reference", Twilight starts to ask Rainbow Dash about her sonic rainboom, but she gets Genre Savvy and immediately rescinds her question. Dash tells anyway, and Twilight wishes she hadn't.
Ed on Ed, Edd n Eddy does this from time to time (like randomly announcing "I forgot to wear underwear, guys" in "Shoo Ed").
Grandpa: And for your information, children, I had relations with Kristal last night. Huey & Riley: Aw man, why would you share that? How am I supposed to have nice dreams tonight, man?!
In The Simpsons episode "Eight Misbehavin'", Homer enters the Kwik-E-Mart to find Apu sitting in the ice cream freezer:
Apu: By chilling my loins, I will increase the chances of impregnating my wife. Homer Whoa! To much in-for-mation! Thanks for the mental picture! Why don't you tell us what you REALLY think? Apu:(annoyed) Will you stop spouting those hackneyed quips!
Lana: I mean, what do we really know about Conway? Archer: Only that he's not circumcised. Lana: ... okay, glossing over how you came across that piece of information— Archer:We touched penises. Lana: No. Glossing!
Similarly, in "Movie Star:"
Pam: So now we start Operation...um... Cheryl: Dick Sledge. (beat) Gilette: Do you wanna... Pam: Not really, but it's like sour milk; you just gotta take a whiff. What's the story, neckbones? Cheryl: Freshman year in my stupid college, I had a huge crush on this guy named Dick Sledge. But he never even noticed me; he wouldn't even sign my cast when I broke my own arm. So one day I decided to sneak into his apartment and see what kind of music he liked, or turtles, or roll around in his clothes or whatever... Pam: But you were so busy sniffing his jock you didn't notice him come in. Cheryl: Yeah, and I must have blacked out because I don't remember stabbing him at all. Gilette: Why did you have a knife? Cheryl: It wasn't a knife; it was a stupid pair of scissors! (picks up a pair of scissors) And it was his fault for grabbing me with his throwing hand! ...they said he could have gone pro. Gilette: OK, glossing over why you broke your own arm... Cheryl: So he'd sign my cast...
Ron: Augh! You kissed a synthodrone! Kim: I never kissed him. But I wanted to. Ron: Okay, too much information.
In South Park, the official measure of penis size is called "TMI." (This is likely a play on "BMI," an actual measure of weight).
In "Imaginationland" Steven Stotch gives a little too much information on what he thinks has happened to Butters.
Steven Stotch: "We don't want to jump to conclusions but... we're worried that somebody kidnapped Butters, sodomised him over and over and then fed his genitals to wild animals."
"Korn's Groovy Pirate Ghost Mystery" has a running gag where two graveyard employees just assume whoever stole Kyle's grandmother's corpse is a necrophiliac and go into way too much detail about what they think he might be doing with the body. Including one demonstration of what they think it might sound like using their fists and a jar of mayonnaise.
Fu Dog names this trope to keep Lao Shi from talking about an... interesting... experience from his youth; "TMI! Know what that stands for? Too Much Information!"
Reporter: We now go live with breaking news from helicopter 2 flying above the hotel!
*Vlad's clothes fly away and the walls disappear into invisibility. Vlad's towel flies away.*
Vlad: Oh, butter brittle!
*Sam and Tucker laughing loudly as they watch an embarrassed, naked Vlad through an incorporated TV-screen in the control panel.*
Tucker: Can you say 'too much information'? *Laughs*
Sam: Maybe when I 'm done suppressing my gag reflex. *Snickers*
Fillmore!: in the first episode, they encounter a Granola Girl potter who proclaims that she couldn't have graffiti'd the school bathrooms:
Jean Grace: I can't help you there. I don't believe in indoor plumbing, and I have never set foot in a school bathroom. I always go out- Ingrid: Uh. Don't even wanna know.
Never sit behind old women on a bus. Really.
Similarly, never use the word "prostate" around men over 50.
It's found on many Medical-related humor lists that a sign that you're in the Medical Profession is that You see no problems in discussing graphic medical problems over food, especially if it's something like meaty dishes or Spaghetti and meatballs.
Pathologists seem to have a particular knack for this, as well as, say, demonstrating the flexibility of a trachea. Apparently, some professionals of the postmortem medicine have a running competition regarding who can get the most hapless interns to faint.
People who have Aspergers may not always know when something is inappropriate (due to their blindness to social cues) and can invoke this trope.
Often occurs between friends of any combination of gender and/or sexuality when the details of sexual encounters are brought up in conversation.
Which leads to a long-standing joke that, if a woman wants to get out of work (and has a male boss), all she needs to cite are "lady problems", and he'll quickly give her the day off to avoid hearing the Squicky details.
Don't ask hide fans how he died. If they say "it was an accident" rather than "it was suicide," TAKE THAT AT FACE VALUE. If you ask "what kind of accident," you will likely learn what kind of accident those fans think it was.
Minoru Niihara from the band Loudness. Do NOT read his personal blog unless you want to become very intimately acquainted with the problems of his anus.
In her last Oscars special, Barbara Walters got Precious actress Mo'Nique to reveal that A) she hasn't shaved her legs since the first time she tried it (the actual shaving bit wasn't bad, it was the hairs growing back that hurt), B) she's in an open relationship with her husband, and C) she got "inspiration" for Mary Jones from a brother who she hasn't talked to since he apparently squicked her out while holding one of her newborn twins.
There are people who give too much information in their tweets. Made fun of in Penny Arcade.
Similarly, Facebook or Foursquare.
For good or ill, after children grow up to become adults there is often a sudden revelation of things that have been going on around the family that they wish they had never found out about. Examples include finding out about the sex lives of the new adult's parents or that a family member that they liked is really a sex offender.
But these are nothing compared to figuring out that you're inheriting a negative amount of money— a mountain of debt. On the other hand, you must know that.