Sink/Clean-in humour

Toilet or gross-out humor (occasionally referred to as potty or crude humor) is the weakest type of humor. It is mainly used a lot in modern TV shows and movies, which is one of the problems: it is overused. This type of humor has been popular since the 90s but it originated from the 80s or before. While toilet humor isn't bad all the time, it can be detrimental to comedy and it ends up grossing out the audience most of the time, sometimes even more than the characters themselves who were part of it. Remember, despite the name, it doesn't necessarily have to refer to humor relating to toilets alone such as urine and feces. It can also apply to genitalia or other bodily functions such as vomit, mucus, earwax, saliva, lint, toe jam, flatulence, and belching.

Notable TV Shows That Used Toilet/Gross-Out Humor

 * Looney Tunes (Used from Pepe Le Pew)
 * Teen Titans Go! (especially in "Serious Business" and "Butt Atoms")
 * The Loud House (Used with Lily's soiled diapers that have a strong odor, Lana and Lynn's gross habits, and Lincoln and Lori's flatulence.)
 * Danger Mouse (2015) (A villain was a toilet called Dr. Loocifer, formally John)
 * mh:besttvshows:JoJo's Bizarre Adventure (Stardust Crusaders, Iggy passing flatulence on Jean Pierre Polnareff's face and Noriaki Kakyoin feeding one of the main antagonists, a baby named Mannish Baby his own feces, which is really baby food laced with his feces. This was done as punishment and revenge for his evil deeds.)
 * mh:besttvshows:It's Always Sunny in Philadelphia (Season 4, Episode 7, "Who Pooped the Bed?"; someone defecated in Frank and Charlie's bed and they, alongside Mac and Dennis, attempt to find the culprit)
 * Fanboy & Chum Chum
 * Breadwinners
 * Sanjay and Craig (Very common in the first season, not so much in later seasons)
 * Secret Mountain Fort Awesome
 * Fleabag Monkeyface
 * Almost Naked Animals
 * DuckTales (1987; sometimes)
 * mh:besttvshows:Goof Troop (sometimes)
 * mh:besttvshows:Pepper Ann (sometimes)
 * mh:besttvshows:Recess
 * Dexter's Laboratory
 * Johnny Bravo
 * The Powerpuff Girls
 * mh:besttvshows:Courage the Cowardly Dog
 * mh:besttvshows:Time Squad (sometimes)
 * mh:besttvshows:Sheep in The Big City (sometimes)
 * mh:besttvshows:Codename: Kids Next Door
 * The Grim Adventures of Billy & Mandy
 * mh:besttvshows:Evil Con Carne
 * Planet Sheen
 * Rocket Monkeys
 * The Ren & Stimpy Show (Common, but occasionally every once in a while, unlike its 2003 adult reboot)
 * Oggy and the Cockroaches (Like in The Ren & Stimpy Show, it's used every once in a while)
 * Mega Babies
 * mh:besttvshows:Superjail!
 * mh:besttvshows:The Annoying Orange
 * mh:besttvshows:Grojband (Occasionally used with offscreen vomiting, excessive flatulence, etc.)
 * Blackadder Goes Forth (Actually joked about this trope)
 * The Wacky World of Tex Avery
 * Cat Burglar
 * It's Pony (Only in Beatrice and Horse on a Hot Tin Roof)
 * Zuzubaland (Used with Zuzu and Garfidea's flatulence.)
 * Larva (Season 1-3; mh:besttvshows:Larva Island)
 * Family Guy (mainly, seasons 8-present)
 * SpongeBob SquarePants (especially in Season 6)
 * The Patrick Star Show
 * mh:besttvshows:Adventure Time (in earlier seasons)
 * mh:besttvshows:Bluey (Particularly, the episode "Markets", which features a scene of a horse pooping, what makes it worse is the scene graphically shows it. Thankfully, it's censored on Disney+)
 * The Day My Butt Went Psycho!
 * Johnny Test (on a few occasions, especially the Johnny X episodes where flames come out of Johnny's butt on the opponents)
 * Pig Goat Banana Cricket
 * Billy Dilley's Super-Duper Subterranean Summer
 * SuperMarioLogan
 * mh:besttvshows:The Baby Huey Show
 * Spliced (Gross out moments are somewhat minor, But in episodes "Bite, Shuffle and Moan", "Cleaning Up", The beginning of "Taste of Friendship", "Stomach on Strike", and The beginning of "Yetis don't care about nothin" Heavily focus on making the audience grossed out. Also, there are 2 times where the characters turned inside out for a few seconds.)
 * mh:besttvshows:American Dragon: Jake Long
 * mh:besttvshows:Hi Hi Puffy AmiYumi
 * mh:besttvshows:Invader Zim
 * mh:besttvshows:Rocko's Modern Life
 * mh:besttvshows:Harvey Beaks
 * Ed, Edd n Eddy
 * mh:besttvshows:Beavis and Butt-Head
 * Home Movies
 * The Smurfs (2021 series) (But only when a character farts and the Smurfs reacting to Baby Smurf soiling his diaper, IT WAS SUPPOSED TO BE A JOKE!)
 * The Brothers Grunt
 * Diego and Glot
 * Bunny Maloney
 * The Three Friends and Jerry
 * Fly Tales
 * Bob & Margaret
 * Baby Blues (2000 animated series; sometimes)
 * mh:besttvshows:Mission Hill (sometimes)
 * The Oblongs (sometimes)
 * mh:besttvshows:The Magic School Bus (and it's reboot) (Had a whole episode dedicated to poop, Mr. Enter reviewed it)
 * Smosh
 * The Ripping Friends
 * mh:besttvshows:Denis and Me (The ending scene in Episode 9 where the snail is flatulating with the whistle and in "Skunk'd"
 * The New Adventures of Beany and Cecil
 * Ren & Stimpy "Adult Party Cartoon"
 * Cans Without Labels
 * mh:besttvshows:Buddy Thunderstruck (especially with "Get the Hock Out" and "Cannonballistic")
 * mh:besttvshows:Dooly the Little Dinosaur
 * Pororo the Little Penguin
 * Little Hero Super Z
 * mh:besttvshows:Pelswick
 * Stressed Eric
 * Mr. Meaty
 * South Park (Commonly in Season 1, especially in "Cartman Gets an Anal Probe")
 * Craig of the Creek! (although the show doesn't rely on gross-out and toilet humor, a few episodes have it with the episodes being “Fall Anthology” which contain shots of JP with live-action lips, “Fort Williams” where the beginning features a gross closeup of Craig's infected eye, “Alone Quest” where it's full of toilet humor from having the main plot about Craig defecating and a joke about Kelsey flatulating, and “Snow Place like Home” where it features unnecessarily detailed closeups of the characters faces, Kelsey with a bulging muscular arm, veins and all, and JP's neck extending to uncomfortable lengths)
 * Poochini's Yard
 * mh:besttvshows:Pingu (This type of humor was used once in the episode "Little Accidents" (also known as "Pingu's Lavatory Story"), which had a scene where Pingu urinated on the floor)
 * Bob the Builder (Although it is very rare in the series, both "Travis and the Tropical Fruits" (which rarely aired in the US) and "Built to be Wild" most notably used this type of humor, with the former relying on jokes about horse manure, and the latter having Spud be the victim of this type of humour in Muck's dream segment in the beginning. One of the deleted scenes of the movie, "Snowed Under" features a scene dedicated to Mr. Beasley (one of Bob's customers and the show's butt monkey) feeding seagulls, only to get POOPED on by them, we can see why it never made it to the film)
 * mh:besttvshows:Horrid Henry (The episode "Henry Changes A Nappy" is infamous due to the episode focusing on this nature. Henry's baby cousin, Vomiting Vera is an exaggerated portrayal of a typical baby character and all the things that babies do that people find disgusting (such as spitting up, vomiting, drooling, soiling their diapers, etc.) are magnified to the point that it's unfunny and disgusting to watch and ruins the overall cute natural of babies. It's like the writers of that show don't like babies and sees them as disgusting little creatures that people call “cute”. The scene that received the most criticism is Henry's inexperienced diaper change, we can't blame him, he's just a kid and he was on babysitting duty because his mother was on her phone a long time and it's to the point where she neglects everyone, leaving her eldest son in charge of the family, which is irresponsible and negligent on her part and she didn't care to even HELP her son change her niece's diaper. Of course, due to not knowing how he forgot the most important step, dispose of the dirty diaper and he laid it in Baby Vera's reach, which causes her to play with it and get her own feces all over the house and other people)
 * Rugrats (amplified when Dil joined the cast)
 * Doug
 * mh:besttvshows:The Wild Thornberrys
 * mh:besttvshows:Rocket Power (sometimes)
 * mh:besttvshows:As Told by Ginger
 * mh:besttvshows:Jimmy Two-Shoes
 * mh:besttvshows:Sesame Street (mostly from Oscar the Grouch)
 * mh:besttvshows:Pinky Dinky Doo
 * mh:besttvshows:Dragon Tales (Rarely sometimes)
 * mh:trashyvyondvideos:Grounded and punishment day videos
 * Freaktown
 * Turbo F.A.S.T (especially in the third season (most notably in the series finale, Stalks on a Plane))
 * Cartoon Planet
 * Oh Yeah! Cartoons
 * mh:besttvshows:Random! Cartoons
 * What a Cartoon!
 * mh:besttvshows:Catscratch
 * mh:besttvshows:The X's (sometimes)
 * mh:besttvshows:Wonder Pets! (Rarely happens)
 * Max & Ruby (Rarely sometimes, mostly by Max)
 * 44 Cats (Rarely)
 * The Great Warrior Wall (Rarely)
 * mh:besttvshows:Hey Arnold!
 * Arthur
 * Caillou
 * PB&J Otter ("The Thing That Almost Ate Hoohaw" has Flick getting a wedgie as a running gag, "Watchbird Alert" has a snot joke, and Opal says she has to change a dirty diaper in "Three's a Crowd".)
 * Tamagotchi! (Sometimes)
 * Cyborg Kuro-chan (Sometimes)
 * Kaiketsu Zorori (Sometimes)
 * Motto! Majimeni Fumajime Kaiketsu Zorori (Sometimes)
 * Nontan (1992 anime series) (Sometimes)
 * Gintama
 * mh:besttvshows:Battle for Dream Island (Mostly from Rocky's barfing except in season 2, though other instances are rare)
 * Sgt. Frog/Keroro Gunsou
 * Zip Zip
 * mh:besttvshows:Boy Girl Dog Cat Mouse Cheese
 * Camp Lakebottom
 * Taffy
 * Total Drama
 * Total Drama Presents: The Ridonculous Race
 * Total DramaRama (specifically "Germ Factory" and "Total Eclipse of the Fart")
 * Numb Chucks
 * The Simpsons (especially in the episode, "A Milhouse Divided")
 * The Fairly OddParents (Shown more after Poof joined the cast)
 * mh:besttvshows:ChalkZone
 * mh:besttvshows:The Amazing World of Gumball
 * mh:besttvshows:Unikitty!
 * mh:besttvshows:Mao Mao: Heroes of Pure Heart
 * mh:besttvshows:Dennis and Gnasher (1996)
 * BB3B (One of the main characters is a baby and the center of the humor, mainly jokes about the baby soiling his diaper and vomiting everywhere)
 * Rubbadubbers (Particularly, the episode "Amelia the Babysitter". Since the clouds represent nappies in the “if only” segment, the part where Baby Terence's cloud is full of rain is considered toilet humor.)
 * Slippin' Jimmy (Mostly from the episode "The Exor-sister")
 * mh:besttvshows:Wander Over Yonder (rarely, except "The Ball" and "The Party Poopers")

Why It Usually Sucks

 * 1) This type of humor revolves around bodily function, and thus it becomes less funny and more disgusting.
 * 2) It provides some disturbing and cringeworthy imagery, such as this scene from The Golden Boy.
 * 3) It's typically used as a rather embarassing attempt at pandering towards children.
 * 4) By the 90's, it saw a major rise in popularity and has since been used in different forms of media, such as movies, video games, TV shows, Etc.
 * 5) Some long-running franchises have recently been milking this trope, either as a way to appeal younger audiences or to try and get some cheap laughs out of the audience, thus alienating long-time fans.
 * 6) *Michael Bay's 2007 movie adaptation of the Transformers brand (despite being decent) was already pretty guilty of this type of comedy (with scenes like Bumblebee urinating lubricant on Agent Simmons), but this only got worse in the sequel.
 * 7) *Power Rangers (Super) Ninja Steel often had Monty and Vick (the so-called "comedic" duo of the series) provide a serious overuse of fart jokes, thus creating awkward moments like this.