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[[quoteright:350:[[WesternAnimation/ClassicDisneyShorts https://static.tvtropes.org/pmwiki/pub/images/Goofy_Junior_3267.jpg]]]]
[[caption-width-right:350:Another victim of [[Film/AChristmasStory Soap Poisoning]]?]]

->'''Ralphie as Adult:''' ''[narrating]'' Over the years, I got to be quite a connoisseur of soap. My personal preference was for Lux, but I found Palmolive had a nice, piquant after-dinner flavor - heady, but with just a touch of mellow smoothness. ''[long pause]'' Lifebuoy, on the other hand...\\
'''Ralphie:''' YECCHH!
-->-- ''Film/AChristmasStory''

A common punishment, mostly for children after they have said a dirty word or been caught telling lies, is to get their mouth washed out with soap. This often indicates a very conservative family, or a child who has been neglected and not taught "proper" language.

Starting to become ValuesDissonance to some folks in RealLife due to the fact it can be dangerous (although it used to be TruthInTelevision), but mostly always PlayedForLaughs in movies, television, etc.

----
!!Examples:

[[foldercontrol]]

[[folder:Advertising]]
* A [[http://www.spike.com/video-clips/f840d9/general-motors-gm-soap-in-your-mouth Super Bowl commercial]] showed a montage of kids with a bar of soap in their mouths for no apparent reason. Then we learn that the ad was for a new car with an automatic retracting roof. A kid says "holy [[CurseCutShort sh--!]]" when he sees it in action, hence the soap in the mouth.
[[/folder]]

[[folder:Comic Books]]
* Issue 22 of ''ComicBook/BloodSyndicate'' had an operative of System make this kind of threat towards Masquerade in response to Masquerade cussing at him.
-->'''System Goon:''' Tsk, tsk. Such a gutter mouth. I'm going to ''personally'' make sure you get your mouth washed out with with soap. ''Lye''.
* Volume three, issue 151 of ''ComicBook/GreenLantern'' has Kyle Rayner annoyed that some bank robbers he's confronting are cussing, so he punishes them by washing their mouths out with a construct of a bar of soap.
* Done in ''ComicBook/LuckyLuke'' by Ma Dalton to one of her foul-mouthed (adult) sons, Jack who retaliates by threatening her favourite son Averell to eat one too with an ''axe''. Unfortunately given Averell's [[ExtremeOmnivore eating habits]] this is not a punishment at all.
* ''ComicBook/{{Nextwave}}'': The Captain relates an incident back when he went by "Captain ☠☠☠☠" and introduced himself to Captain America. He later woke up in a dumpster with a bar of soap in his mouth.
* In ''ComicBook/TheSmurfs'', Papa Smurf has a foul-mouthed Smurf brush his mouth with soap, but the resulting bubbles contain the same SymbolSwearing he was using before.
[[/folder]]

[[folder:Comic Strips]]
* In one ''ComicStrip/DennisTheMenaceUS'' strip, Dennis comes outside, with bubbles coming out of his mouth, and he tells his friend that he was "right about that word."
* Aunt Dolly does this to Wal after she hears him swearing at the livestock in an early ''ComicStrip/FootrotFlats'' strip.
* ''ComicStrip/JumpStart'' for [[http://www.gocomics.com/jumpstart/2011/12/16#mutable_727115 12-16-11.]] Marcy Cobb tells her husband Joe that she had to wash out their son Joseph's mouth for lying. Joe reminds her that washing out someone's mouth with soap is for cursing, not lying.
* One ''ComicStrip/LittleLulu'' comic has Lulu taking Alvin to the bathroom to wash his mouth out for using dirty words. [[{{Unishment}} Alvin, however discovers that he likes the taste of soap]] and walks away eating the rest of the bar, leaving Lulu confused.
[[/folder]]

[[folder:Fan Works]]
* In ''[[https://www.fanfiction.net/s/3922556/54/A-Mother-s-Love A Mother's Love]]'' Chapter 54, Kushina punishes Tayuya with this at least four times for swearing in front of her and will sometimes threaten to get more soap. [[https://www.fanfiction.net/s/4296279/4/A-Mother-s-Love-The-Life-of-Kushina In her own backstory,]] her mother did to her once when she was a child. Borders on HypocriticalHumor when she and other ninjas still swear on occasion.
* ''[[https://m.fanfiction.net/s/4638909/1/The-Heavy The Heavy]]'' finds Sonic forced to pull this punishment on Tails early in their relationship after the cub's foul mouth causes a public incident. He does not like it anymore than Tails does.
* In ''Fanfic/NoSuchLuckNoSuchLove'', Lori forces Lola to brush her teeth with soap after she yells "Bullshit".
* ''WebVideo/SleepoverAtFluttershys'': Applejack subjects Apple Bloom to this when the latter uses one too many curse words. Then Applejack slips up herself, giving Apple Bloom an opportunity for revenge.
* In the ''Literature/SherlockHolmes'' fanfic ''Fanfic/AStudyInSituations'', Mrs. Hudson washes out one of the Irregulars' mouths with soap after he says something profane about Holmes' scale of pay. The boy protests by saying that Holmes says the same word.
* In ''[[https://www.fanfiction.net/s/7468970/1/Uzumaki-Naruto-Birth-of-the-New-Demon-King Uzumaki Naruto: Birth of the New Demon King,]]'' the Kyuubi threatens Tayuya with this punishment every time she swears. Unfortunately, since it's [[LadySwearsALot Tayuya]], she'd had ''forty-two'' bars of soap shoved in her mouth ''that past'' '''''week'''''.
* In ''Fanfic/EverydayLifeWithUltimateGirls'', Makoto does a variation on this, using sour mouthwash made by Seiko and Ruruka instead of soap on [[ThinSkinnedBully Hiyoko]] when she goes too far in her pranks, disguising it as fruit juice and using it to "do something about that mouth of hers".
* Referenced in the blooper reel for ''Fanfic/GlitterForceIntoTheGlitterverse'': the bit with [[Anime/HeartcatchPrettyCure Erika]] and [[Anime/SmilePrecure Joker]] both cursing is called "Erika Needs Soap in the Mouth".
* ''Fanfic/NierAutomataREBirth'': After Alex's [[BabysFirstWords first word is the name of the android Jackass]], his [[AlmightyMom mother A2]] decides that to prevent her son from saying more swears, she has Jackass change her name to Jacqueline and, [[InvokedTrope after asking 9S what humans did to punish swearing]], punishes ''Jackass'' by washing her mouth with soap every time Alex says her old name.
-->'''Jackass[=/=]Jacqueline''': Why, God?! Why did you let your humans build us with taste receptors?!
[[/folder]]

[[folder:Films -- Live-Action]]
* ''Film/AChristmasStory'':
** Happens to Ralphie after he pulls a PrecisionFStrike. After sending him to bed, his mother sticks the soap in her own mouth, just to see what it tastes like. It's as disgusting to her as it is to him. It also is mentioned in ''In God We Trust, All Others Pay Cash'', the book on which the film is loosely based.
** When Creator/RogerEbert reviewed the movie, he commented and confirmed most of Ralph's soap flavors. He also commented that the "nuclear option" when he was growing up was Lava (a pumice soap, used mostly by mechanics and such), "Lava was for words we didn't know yet."
* ''Film/LePupille'': Sister Fioralba, the SternNun Mother Superior at a Catholic orphanage, catches the kids singing along with a song on the radio with the lyric "Kiss me, baby, on my little mouth." She washes their tongues with soap.
* In ''Film/VictorVictoria'' the mobster is thought by his girlfriend to be attracted to a man ("Victor" who is actually a woman playing a man playing a woman). His girlfriend keeps going on about it, and he grabs a bar of soap. We expect rough anal sex as punishment to ensue; the next scene has his furious girlfriend throwing furniture at him- with a mouthful of soap.
* ''Film/WhoFramedRogerRabbit'': When the Toon Patrol tries to interrogate Eddie on Roger's whereabouts, the leader Wiseass tells him to "cut the bull-schtick". Eddie responds, "You keep talking like that and I'm gonna have to wash your mouth out," and he shoves the bar in the mouth. The other weasels laugh at him as he coughs up bubbles, and he spits out the bar in one of them.
[[/folder]]

[[folder:Jokes]]
* Joke: if a mute swears, [[UsefulNotes/SignLanguage does his mother wash his hands with soap]]?
* Creator/GeorgeCarlin, from his "Parental Cliches and Kids’ Secret Answers" routine:
-->'''Parent:''' I'll wash your mouth out with soap!\\
'''Kid:''' I'll blow bubbles out my ass!
[[/folder]]

[[folder:Literature]]
* In the picture book ''The Attic Mice'', written by Ethel Pochocki and illustrated by David Catrow, the mother does this to one of the mouse children after he gets too mouthy with her. Afterwards, he runs away and ends up eating a large portion of a bar of raspberry soap, thinking mistakenly that it was a treat. He ends up falling ill and the mother blames herself for it, not realizing what he did.
* ''Literature/AscendanceOfABookworm'' has a spell called ''waschen'' that consists of briefly summoning a swirling bubble of water to clean anything contained within it. At some point, one character is about to say something another considers best kept silent, so the latter casts a ''waschen'' around the former's head and insists they saw dirt on their mouth.
* "Body Ritual among the Nacirema" by Horace Miner, an anthropological satire describing {{Eagleland}} as if it were an obscure tribe, {{parodie|dTrope}}s the trope as "a ritual ablution of the mouth for children which is supposed to improve their moral fibre", consistent with the [[SdrawkcabName Nacirema]] obsession with [[UncleanlinessIsNextToUngodliness physical and moral cleanliness]].
* ''Literature/TheCatcherInTheRye'': Holden Caulfield tries asking Ward Stradlater if Stradlater gave Jane Gallagher the time. That, by the way, is ''old'' slang for having sex with someone. Stradlater responds "What a thing to say. Want me to wash your mouth out with soap?"
* "Charles" by Creator/ShirleyJackson: This happens twice at the school the protagonist's son Laurie attends. The first time, Laurie says that fellow student Charles tricked a classmate into swearing in front of the teacher and getting her mouth washed out with soap. Then, Charles says the swear himself several times, getting his mouth washed out each time.
* ''Literature/DiaryOfAWimpyKid'': In "Rodrick Rules", Greg ends up with this as a result of a failed attempt to tell on Rodrick for saying a bad word. Rodrick got off scot-free.
* ''Literature/HarrietTheSpy'': Harriet's mother threatens to do this when Harriet keeps using the word "damned."
* In the ''Literature/HarryPotter'' series, casting the cleaning spell ''Scourgify'' on a human will result in their mouth being washed out with soap. James Potter used it this way on Snape in the "Snape's Worst Memory" flashback from ''[[Literature/HarryPotterAndTheOrderOfThePhoenix Order of the Phoenix]]''.
* ''Literature/LabyrinthOfReflections'': In the second book, ''False Mirrors'', Chingiz jokingly threatens his teenage apprentice Pat with this for saying that [[HeterosexualLifePartners Padla]] came back home late in the night "drunk as ass", forcing the boy to choose words carefully when telling about the rest of Padla's adventure (which involved smuggling in a prostitute in a sports bag).
* In ''Literature/TheLuckUglies'', a children's fantasy novel by Paul Durham, the main character uses "pigshanks" as a curse word, but it's noted that her mother would wash her mouth out with soap if she ever heard her say it. The book has a glossary in the back of terms used within it. Regarding "pigshanks," it has only this to say: "A bad word. Use it, and your mother is likely to scrub your tongue with soap and a horse brush."
* In ''Literature/LuckyYou'' by Creator/CarlHiaasen, there's a white supremacist whose nice liberal parents once washed his mouth out for saying the N-word. Now he can be as racist as he pleases, but he can't bring himself to utter the N-word, much to the amusement of the other white supremacists.
* The autobiography of Aileen Porter, ''Literature/PapaWasAPreacher'', tells about how she got her mouth scrubbed out with soap for saying "I'll be John Brown" within her father's hearing.
* Literature/SisterhoodSeries by Creator/FernMichaels: ''Collateral Damage'' has UsefulNotes/{{FBI}} director Elias Cummings threaten this sort of punishment to Daniel Winters for throwing four-letter words around.
* In ''[[Literature/TheKaneChronicles The Throne of Fire]]'', Carter Kane says that his sister Sadie called Apophis some names that if their grandmother heard them would cause her to wash Sadie's mouth out with soap for a year.
* ''Literature/WhateleyUniverse'': Mentioned in [[http://whateleyacademy.net/index.php/content_page/9/371 "The Three Little Witches"]] after Abra lets out a PrecisionFStrike due to suffering a very humiliating failure in a long list of failures:
--> “It was a '''''cluster fuck'''''!” Abra snapped as she paced around the floor in Clover’s room.\\
“Abra!” Clover gasped, “If Mrs. Nelson heard you, she’d wash your mouth out with soap!”
[[/folder]]

[[folder:Live-Action TV]]
* ''{{Series/Cybervillage}}'' has a variant (and a subverted one to boot). When Baragozin's deputy tries to beg him to undo the decision to fire him, Baragozin gives him a soap bar. The deputy thinks he must eat the soap as punishment. In reality, the BlankSlate Baragozin was trying to see if it was edible.
* Used in ''Series/{{Dinosaurs}}'' when Baby learns rude words from television. When Fran washes his mouth out, every time a bubble from his mouth pops it echoes the word.
* During an episode of ''Series/TheHoganFamily'', one of the boys curses constantly until Valerie does this.
* In a ''Series/{{Jessie}}'' ChristmasEpisode, after Bertram tells Emma [[AssShove he knows where she can put]] her decorations, Jessie warns him not to make her wash his mouth out with tinsel.
* In an episode of ''Series/KnotsLanding'' featuring a scene at a GreasySpoon, a female child in a booster seat (Creator/JudithBarsi) responds to the waitress asking her what she wants for lunch by saying "caca" (shit in Spanish) and her mother picks the child up and carries her towards the exit, ignoring the screaming child and saying "You are getting SOAP for lunch, young lady!".
* Lois from ''Series/MalcolmInTheMiddle'' goes the extra mile by putting dish soap on a toothbrush and reaming out her sons' mouths with it.
* ''Series/MyWifeAndKids'' Junior decides to run the name Chuck through The Name Game algorithm in the presence of his parents. [[CurseCutShort Cut to Junior sitting at the kitchen table with a bar of soap in his mouth]].
* On ''Series/ResidentAlien'', the HughMann alien Harry Vanderspeigle regularly swears around Max Hawthorne, who can see through to his alien form, as well as his friend Sahar. In "[[Recap/ResidentAlienS1E9WelcomeAliens Welcome Aliens]]", Sahar threatens Harry with this if he doesn't stop. He tells her that [[ThreatBackfire he likes eating soap]] and swears a whole bunch more, telling her to bring it on.
* ''Series/SaturdayNightLive'': Sean Spicer as played by Creator/MelissaMcCarthy attacked a reporter with [[WaterGunsAndBalloons a Super Soaker]] full of soap water to wash out his "filthy lying mouth".
* One ''Series/SesameStreet'' episode spoofs this in classic Grouch fashion: Oscar's mother washes his mouth out with ice cream as punishment for saying "please."
* ''Series/{{Supernanny}}'': One mother used a squirt bottle of soap to discipline her son for telling his brother to "smell his own buttcrack". Jo Frost (the titular nanny) was ''[[WhatTheHellHero horrified]]'', and tried to convince the mother that she was invoking DisproportionateRetribution and poisoning the boy. Sadly, the mother's ego was too over-inflated, and she saw it as a way to command the respect she thinks she deserves, causing Jo and the mother to cuss each other out. And her poor husband sits there suffering. [[https://www.youtube.com/watch?v=iWFudcOHwJ8 It really has to be seen to be believed]].
* In the ''Series/UnitedStatesOfTara'', Alice, one of Tara's alters who is a 1950s housewife, invokes this trope after Kate gives her EthicalSlut rant. Alice follows through on the threat, driving Kate to get a job so she can move out (which becomes a major subplot for the next two seasons).
* Happened several times on ''Series/YouCantDoThatOnTelevision''. One sketch had a kid get his mouth washed out with French soap for swearing in French. Another had a kid get his mouth washed out by his smoking parents for saying "Quit." One other sketch, a boy was swearing on purpose so his mother would give him the punishment because he liked the taste of soap.
[[/folder]]

[[folder:Music]]
* Referenced in the second verse of the Music/DosGringos track ''Jeremiah Weed'' after the narrator at a tender age told his parents of his life ambition to "fly the fucking F-16".
* Cry Baby does this to herself in Music/MelanieMartinez's "Soap". She's gotten her heart broken by a man and she washes her mouth with soap whenever she tells him she loves him.
-->''God I wish I never spoke. Guess I better wash my mouth out with soap.''
* In "The Life & Death Of Mr. Badmouth" from ''Music/UhHuhHer'', Music/PJHarvey tells her lover to "rinse his mouth out with soap".
[[/folder]]

[[folder:Pro Wrestling]]
* Wrestling/{{Ivory}} actually tried to do this to Wrestling/{{T|erriPoch}}ori during their [[GarbageWrestler hardcore]] [[http://www.wrestling-titles.com/wwe/wwf-wm.html WWE Women's Title]] match on the September 6, 1999, ''Raw'' as they started the match in the bathroom and proceeded to fight through the shower.[[note]][[FridgeBrilliance Her name is "Ivory," after all.]][[/note]]
* Wrestling/PaulHeyman came off on the receiving end of this when Wrestling/{{Rhyno}} lost a "Wash Your Mouth Out With Soap" match to Wrestling/JohnCena, all the while in a Sharpshooter courtesy of Wrestling/ChrisBenoit.
[[/folder]]

[[folder:Video Games]]
* Part of Code Talker's backstory in ''[[VideoGame/MetalGearSolidVThePhantomPain Metal Gear Solid V]]''; at the [[BoardingSchoolOfHorrors Indian boarding school]] he was sent to as a child, this was the punishment for the students speaking their native tongue.
* The response to the player swearing in ''VideoGame/TheVeryBigCaveAdventure'':
-->''You are in the Swear Box.\\
It is a bare room with neither windows nor doors.\\
In one corner is a washstand and a cake of soap.\\
You know what to do.''
[[/folder]]

[[folder:Web Animation]]
* What Sam gets when he says "Fuck you!" to his bosses in ''WebAnimation/LooneyTunesIntroBloopers''.
[[/folder]]

[[folder:Web Comics]]
* In one ''Webcomic/BobAndGeorge'' subcomic ''Jailhouse Blues'', Mega Man is fighting the foul-mouthed Yo Mamma Man and recalls how his mother always threatened to do this if he swore. Mega Man uses this as inspiration to use his Hypno Soap weapon to defeat Yo Mamma Man, but not before wondering how he knew that since he never had a mother.
* In ''Webcomic/KnightsOfBuenaVista'', Dick gives his PlayerCharacter a flaw of thinking his pet can talk. His character thinks his pet said something horrible about a princess, and said he was going to do this to his pet.
* Played straight when a Bear orders it in ''Webcomic/CityOfDream''. Which leads to TalkingWithSigns.
* ''Webcomic/LatchkeyKingdom'': A cultist [[http://latchkeykingdom.thecomicseries.com/comics/269 gets grabbed]] by a Krampus after swearing, and promptly submitted to [[http://latchkeykingdom.thecomicseries.com/comics/270 the soap.]]
* ''Webcomic/{{Narbonic}}'': Helen's mother punished her daughter for saying the "g-word" (No, she wasn't swearing in Russian or Polish -- as a CardCarryingVillain, Helen Senior finds the word "good" obscene and dirty).
* ''Webcomic/TiffanyAndCorey'': Tiffany does it to Corey in [[http://tiffanyandcorey.blogspot.com/2018/02/dirty-language.html this cartoon,]] apparently after Corey picks up bad language at a golf course.
* ''Webcomic/{{Forestdale}}'': Adam summers and his father wind up receiving this punishment for their foul language, the former for being caught swearing by his mother while he was watching a baseball game and the latter for not only swearing but accidentally teaching his son the word itself.
[[/folder]]

[[folder:Web Original]]
* {{Inverted}} with [[https://scp-wiki.wikidot.com/scp-1331 SCP 1331]]: a bar of soap which, when it comes into contact with a human's mouth, causes any profanity uttered for a period of time logarithmic to time applied (10 seconds > 1 hour) to be subjected to SoundEffectBleep.
[[/folder]]

[[folder:Web Videos]]
* Used in the WebVideo/{{Smosh}} episode "If Cartoons Were Real". The ''WesternAnimation/SouthPark'' parody has Stan's mouth being washed with soap.
[[/folder]]

[[folder:Western Animation]]
* ''WesternAnimation/TheAdventuresOfJimmyNeutronBoyGenius'': Cindy washes out her ''own'' mouth with soap after Jimmy forces her to give him a compliment.
* ''WesternAnimation/{{Animaniacs}} (1993)'': In "Roll Over, Beethoven", Yakko, Wakko and Dot do this to Beethoven after he describes himself as a 'pianist'.
* In the ''WesternAnimation/{{Bonkers}}'' episode "Imagine That", Bonkers D. Bobcat washes Lucky Piquel's mouth with soap after he reads aloud toon graffiti of [[InformedObscenity a tree, a mailbox, and a book]].
* Pictured above, Goofy's son ([[WesternAnimation/GoofTroop no, not that one.]] The other one.) in the WesternAnimation/{{Classic Disney Short|s}} ''WesternAnimation/FathersArePeople''.
* Another WesternAnimation/{{Classic Disney Short|s}} ''The Practical Pig'': A lie detector uses this on the Big Bad Wolf.
* ''WesternAnimation/CowAndChicken'':
** The HalloweenEpisode "Halloween with Dead Ghost, Coast to Coast" featured the Red Guy (masquerading as a WesternAnimation/SpaceGhost pastiche) trying to use this on Chicken, albeit he initially thought he was supposed to wash Chicken's mouth out with ''soup'' until Chicken corrected him.
** In "Bad Chicken", Chicken's paper clone mouths off the Teacher and the Teacher responds by threatening to wash his beak out with soap.
** In "Duck, Duck, Chicken", the lawyer trying to prove Chicken is...a chicken when Cow and Chicken's family sue the Red Guy for surgically turning him into a duck shows some slideshows from Chicken's childhood. One of the slides shows Chicken as a baby with a bar of soap in his mouth, the lawyer referring to the picture as "Chicken's first word".
* ''WesternAnimation/DennisTheMenace'': Discussed in "The Abominable Snow Menace" when Mr. Wilson hears that Dennis will be accompanying the Wilsons on a ski trip.
-->'''Mrs. Wilson''': Isn't it just too lucky for words?\\
'''Mr. Wilson''': Well, ''I'' can think of a few words.\\
'''Dennis''': What are they, Mr. Wilson?\\
'''Mr. Wilson''': If I told you, you'd have to have your ears washed out with soap.
* In the MissingEpisode of ''WesternAnimation/DextersLaboratory'', "Rude Removal", Dexter accidentally creates evil versions of himself and Dee Dee who spout [[ClusterFBomb swear-filled rants]] in front of their mom. When the regular versions trap them and feel like all's well, they spot Mom with a large bar of soap waiting to wash their mouths out.
-->'''Dexter:''' [[OhCrap Oh]] [[PrecisionFStrike shit.]]
* ''WesternAnimation/TheDickTracyShow'': Hemlock Homes uses a LieDetector (episode of the same name) on Stooge Viller and Mumbles. When a total whopper is told, the machine uses a bar of soap and washes out the culprit's mouth with it.
* ''WesternAnimation/DrawnTogether'' has a rather weird example in the episode "Captain Girl". When Toot's horrible parenting skills are causing her Nicaraguan Baby to start acting like a teenage tramp, she (very drunkenly) grounds her, to which the baby responds by flipping her the bird. Toot replies "Watch your mouth you [[HypocriticalHumor filthy whore]]! Don't make me wash my mouth with ham!" And then proceeds to do just that: wash her own mouth with a whole leg of ham.
* Discussed in the ''WesternAnimation/FostersHomeForImaginaryFriends'' episode, "Crime After Crime"; Mr. Herriman makes up new rules so no one will suspect his carrot addiction, one of which involves not standing on rugs. Wilt stands on a rug upon hearing this new rule, and throughout the episode, he tries to decide on how to punish himself. At one point, he suggests washing his mouth out with soap, but decides against it because if he did that, he'd be touching the soap (as Herriman had earlier punished some other imaginary friends for touching toys).
* ''WesternAnimation/KingOfTheHill'': In "That's What She Said", Hank washes out the foul mouth of a new employee with soap. It should be noted that he's still making filthy jokes right up until Hank starts scrubbin'. To be fair though, he absolutely deserved it. He spent the whole episode harassing the employees by telling dirty jokes and grabbing their bottoms to the point where they were too afraid to stand up. Even Strickland admits he didn't find his ways to be funny.
* ''WesternAnimation/MagillaGorilla'' was occasionally a victim of this punishment for "lying". ({{Cassandra Truth}}s, actually).
* Elmyra does this to Brain every time she thinks he is swearing (when he is actually just indulging in SesquipedalianLoquaciousness) in ''WesternAnimation/PinkyElmyraAndTheBrain''.
* In ''WesternAnimation/PepperAnn'' episode "The Way They Were", 5-year-old Pepper Ann has a bar of soap stuffed into her mouth for saying "jerk", and is to stay in the bathroom to reflect on her own actions while her mom is still pregnant with her second child, who turns out to be Margaret Rose, or "Moose".
* ''WesternAnimation/ThePowerpuffGirls1998'' episode "Curses" had the Mayor of Townsville summon Ms. Bellum to do this to the girls when they said the swear word they learned from Professor Utonium in front of him. In addition, the girls later use this punishment on the giant potty-mouthed monster after learning that it is unacceptable for children to swear. But Buttercup still uses the word at the end, so when the girls do their normal poses during SoOnceAgainTheDayIsSaved, she's the only one not posing, instead looking grumpy and having her mouth washed with soap.
* In ''WesternAnimation/TheRenAndStimpyShow'' episode "I Was a Teenage Stimpy", Ren shoves the whole bar in Stimpy's mouth when he mouths off at him.
* ''WesternAnimation/Rugrats1991'': In "[[Recap/RugratsS5E4TheWordOfTheDayJonathanBabysits Word of the Day]]", when Angelica uses a swear word, her mother asked Didi if she should use this as a solution. She then asked her if she should use toothpaste as a substitute if soap was too toxic.
* ''WesternAnimation/TheSylvesterAndTweetyMysteries'' episode "Moscow Side Story" had Tweety inform Sylvester that Granny would wash his mouth out with soap after hearing the cat say "bolshoi".
* ''WesternAnimation/TeenTitans2003'': Mother Mae-Eye does to Starfire after Starfire breaks her conditioning and attempts to tell the other Titans what Mother is really doing in "Mother Mae-Eye".
* In an episode of ''WesternAnimation/TomAndJerry'', Jerry does this to Tom after he lies about being sick to his owner (when in reality he just didn't want to go outside on a rainy day). Not that anyone can blame Tom, mind you. The owner had also threatened Tom with that punishment.
* The ''WesternAnimation/WildWestCowboysOfMooMesa'' episode "Another Fine Mesa" had Lilli Bovine mention that she'd like to wash out Sheriff Terrorbull's mouth with soap.
* In Disney's ''WesternAnimation/TheWuzzles'', Crock threatens to do this to Flizard in the first episode "Bulls of a Feather" after Flizard talks about getting work.
[[/folder]]

[[folder:Real Life]]
* Website/TheOtherWiki has [[http://en.wikipedia.org/wiki/Washing_out_mouth_with_soap an article]] about the topic. The practice has been around since at least the 1800s and a number of actual cases are noted in the article, with a note that it may not be advisable, due to potential health consequences.
** It was a common punishment (along with beatings) for Native Americans speaking their indigenous languages in many a colonialist BoardingSchoolOfHorrors. Apparently, in the colonizers' InsaneTrollLogic minds, Native American languages must have consisted of nothing but swear words.
* Creator/RoaldDahl recorded witnessing an instance of this at his boarding school in his autobiographical book ''Boy''. However, the punishment wasn't for swearing, but for snoring. The nurse got fed up with a snoring kid, and started piling soap shavings in his open mouth, until he awoke in a panic choking on the soap bubbles. Yeah, [[BoardingSchoolOfHorrors Roald Dahl did not have a pleasant school experience]].
[[/folder]]
----