During a party in Amadeus, Mozart does some humorous impressions. When Salieri (in disguise) asks, "Do Salieri", Mozart launches into a snorting, gibberish-laden parody while playing "Twinkle Twinkle Little Star" that ends with a truly epic fart. Of course, it's not played so much for humour as for the sake of reinforcing Salieri's animosity towards Mozart. And given what we know about the Real Life Mozart (see the Music section), it seems he really did enjoy that kind of humour.
Angry White Man: Early in the movie, when Skeeter is singing a song about an X, he starts forgetting the lyrics at "she's a tall drink'a..." since he was very drunk at the time. It eventually culminates in him saying...
Skeeter: She's a taaall drink'a... a tall drink'a my piss!
Another Gay Movie. The sequel takes things even further. Of course these movies are the gay variation of American Pie.
There are two kinds of jokes in the Austin Powers movies. If it's not making fun of the spy genre, it's this.
Babylon (2022) opens with one of its leads, Manny Torres, transporting an elephant to a Hollywood bacchanal with an animal wrangler and driver. When elephant gets scared when being transported up a hill, it relieves itself all over the wrangler in a torrent of diarrhea that even splatters the camera.
Each of the Back to the Future movies had at least one scene where one or more villains ended up covered in manure. It was kind of a Running Gag.
The epic campfire scene in Blazing Saddles features a crew of cowboys eating beans and delivering a storm of farts and belches. The scene was actually considered edgy in its day. It's rather surreally subverted by the early television broadcasts of the film though, as the sound effects for that scene were removed by the censors, leaving a two-minute sequence of cowboys sat round campfires eating and periodically standing up then sitting again, while the fires flare slightly. Later versions had horses whinnying when they stood up, which was even more surreal.
The trailer for The Change-Up is filled with it, most notably a baby shitting on Jason Bateman's face (with an added pause of it happening).
Dark Star has a minor scene where Lt. Doolittle offhandedly mentions that a storage area self-destructed and destroyed the ship's entire supply of toilet paper.
In the original film, Charisse wants to go the bathroom, but her father Dr. Dolittle stops her because there are ducks and a goat in the bathroom. He tells her that she's drinking too many liquids and needs to go back to bed, but she insists she has to go. He manages to hide the ducks in the bathroom and somehow manages to get off without her seeing any of what is going on, even though the house is filled with animals.
In the same film, Maya sneaks her guinea pig Rodney into the hospital during the big meeting with Calnet where the merger is supposed to be signed. He sneaks off into a bathroom and ends up sniffing around the rim of a toilet, only for a woman that Dr. Dolittle treated earlier in the film for a shellfish allergy to come in and sit down, trying to sneak another snack. She sits down on him and realizing this and hearing his squeaks, they scream at each other. She flushes the toilet and leaves, and he shouts "Somebody get the license plate number! I have just been violated!"
Drop Dead Fred includes a scene where he tracks dog poop on the carpet with his shoes.
Dumb and Dumber is replete with a liberal amount of jokes involving urine and defecation. There's even a scene where Lloyd laces his friend Harry's cup of tea with a laxative right before Harry is due to go out on a date with Mary Swanson, who Lloyd loves. Harry's drive to Mary's house shows the laxative is taking effect, and when he arrives, he has to find a bathroom urgently. He finds a toilet, and proceeds to let out an extremely painful poop, although he does find his squeaker fart at the end somewhat amusing. He then opens a window to try and get rid of the smell, waving a towel around in a pathetic attempt to do so. Mary knocks on the door and tells him the toilet is broken, Harry has a literal "Oh Shit" moment. He says he was just shaving, and he is then shown fiddling around with the toilet, trying anything to get it work, even throwing the clapper aside. In the unrated edition, he eventually resorts to completely removing the toilet from the floor and dumping the contents out the window. In another scene, Harry accidentally smearing melted chocolate all over a bathroom, which then is of course mistaken for something else. It also turns it up to eleven with the whole scene involving making use of a broken toilet...
Epic Movie is absolutely full of toilet humor related to farts, burps, vomit, etc.
There is a scene parodying Harry Potter which has an old, ugly, and pregnant Hermione farting a lot.
The scene where Susan chugs an entire keg of beer obviously ended with this. She pukes a ton of vomit at two guys, says she's fine, proceeds to puke over two more guys, and finally, obviously still needing to puke, she locks lips with a Legolas look alike and starts to puke down his throat as he struggles to break free. This is considered so gross that all of their allies don't show up for the final battle.
Evan Almighty loves making bird poop jokes. If you see a bird on screen, something will be stained.
In The Flintstones, as part of the Rubbles' streak of bad luck, their car gets wrecked by piss from an overhead pterodactyl.
In A Field in England, there is a scene where Jacob is heckled by the other characters while taking a rather painfully constipated shit, and then he accidentally falls over and hits his balls on some nettles.
Later on, he is afraid that he is turning into a frog. Cue a shot of another character looking at his crotch using a magnifying glass held at arm's length, with a hilarious concerned expression. He isn't in fact turning into a frog; he's just got some sort of venereal disease (which the audience gets to see a nasty closeup of).
In George of the Jungle, the villain does an utterly gratuitous faceplant in a heap of elephant dung. The movie then epically redeems itself:
Guardians of the Galaxy Vol. 2: When Peter and Rocket start bickering over who is the better pilot, Rocket threatents to put a turd in Peter's pillowcase, then escalates by saying that it won't be his turd, it'll be Drax's turd. Drax chimes in to declare that he has "famously huge turds".
According to Hop, jelly beans are actually the excrement of the Easter Bunny.
Hotel for Dogs: The dogs poop and pee on the floor, so they get given special dog toilets, which the villains fall into.
Idiocracy: "And the number one movie in America was Ass", and that's all it was for ninety minutes, a farting ass.
In Iron Man 2, a drunken Tony Stark amuses the guests at his party by demonstrating the correct way to relieve oneself in the Iron Man suit. This does not involve removing or opening any part of the suit.
The Italian Christmas comedies are made of this. You might wonder why they keep making them.
While not constant, the giants from Jack the Giant Slayer do fart, belch and pick their noses, forgivable because they are portrayed as being grotesque creatures.
The Jerk: Navin's dad tries to teach him the ways of the world - he points to a pile of cow crap and tells him "This is shit." then holds up a tin of shoe polish and says "This is Shinola." Navin distinguishes one from the other...then walks through the one on the ground.
Kenny is an Australian Mockumentary film about Kenny Smyth, a Melbourne plumber who works for corporate bathroom rental company Splashdown. A lot of the film's humour derives from the septic emergencies has to deal with supplying port-a-loos to events.
Looney Tunes: Back in Action contains a scene where Taz makes his entrance doing his usually gibbering which he usually ends with blowing a raspberry but farts instead.
One of the other members of the He-Man Womun Haters Club's attempts to sabotage Alfalfa's date with Darla is with a cat litter sandwich.
Buckwheat: Don't worry, it's pretty fresh.
In the scene where the clubhouse catches fire, Petey's attempt to put out the fire is by peeing on it.
When Alfalfa is put on probation for burning down the clubhouse, he is forced to guard its remains. After a Nightmare Sequence that takes place on a rainy night, Alfalfa asks his friends why he's soaking wet (it was due to a hole in the tent), and Porky tells him that he used to have the same problem.
This exchange when Buckwheat and Porky tell Alfalfa why he can't see Darla:
Buckwheat: Number one, she's not at home because she's at a ballet recital. Number two... what was number two? (Porky whispers something in Buckwheat's ear.) Buckwheat: Not that! The other number two!
Madeline (1998) has Lord Covington step in dog poop, which is how he discovers Genevieve, the girls' pet dog.
Marmaduke has an example that acts as Book Ends: the titular dog says "Wait for it, wait for it..." before farting on his owner and his wife when they are in their bed at night.
Max Keeble's Big Move got slammed by critics, in part because of this (the other part was lack of originality).
The movie Música de Viento (Wind Music, or sorta), a Mexican movie starring Roberto Gómez Bolaños (a.k.a Chespirito), about a man with Hoplophobia (fear of gunfires), who made him fart loudly each time he sees one. The joke of the movie it's the protagonist trying to do anything to disguise the noise, for example, open a bottle in the same time he fart.
In Nanny McPhee, the children make up rude names: "Oglington Fartworthy", "Booger McHorsefanny", "Knickers O'Muffin", "Sandra", "Bosoms", "Bum", and "Poop Bum".
No Holds Barred: During an exhibition fight where Zeus is competing, two of the main villain's stooges stop in the restroom, which is very poorly maintained, to say the least. (The overflowing toilets are full of excrement.) Eventually, a tough guy comes and makes fun of the small endowments of the stooges. Also, there's this "delightful" exchange:
Catherine, in her very first scene, just has to tell Jake that guys she's with like to have anal sex, then she shits on their chests. He didn't ask to be told any of that.
The scene with the girl on the toilet naturally, who's comically loud while shitting and farting, then falls through the floor, with the contents spraying right on a teacher below her.
Our Friend Power 5: While being punished for almost getting Hyuk killed, Dalgeun really has to go to the bathroom, to which his boss allows. Dalgeun staggers out of the room, looking sick and farting loudly.
In Paddington (2014), the titular bear gets his head stuck in the toilet when learning about bathrooms.
In The Party, Bakshi (Peter Sellers) has to take a leak, but can't find an unoccupied bathroom. Getting increasingly desperate, he starts to cross a room when the girl he's sweet on starts singing for a crowd - he stops out of politeness and writhes in smiling agony for the duration. After he finally relieves himself in the master bathroom the toilet won't stop running, and in his attempt to fix it, he breaks the tank lid on the floor, drops a watercolor painting into the tank, and floods the room.
Peter Rabbit has a joke about sticking a carrot up someone's butt and a joke about checking to see if the toilets are clean by drinking from them.
Return of the Secaucus Seven: When all of the major characters are having breakfast, J.T. mentions how on his hitchhiking trips, he'd often eat chili, which gets everyone talking about farts, which puts Chip, the newcomer, completely off his breakfast.
There's quite a bit in Scary Movie, possibly to the point of overuse.
Of course, when you realize Seltzer and Friedberg were two of the writers it makes sense.
The first live-action Scooby-Doo movie has the joke about Scrappy peeing on Daphne. Then there's the burping and farting contest between Scooby and Shaggy.
Secretly, Greatly: Invoked, Ryu-hwan has a schedule for pissing and pooping in public to keep up his "village idiot" persona.
During the Bullet Time sequence in the Bar Brawl, Sonic takes time to wrap up two people with almost all the toilet paper present in the restroom. Sonic later comments that the next person who uses the restroom there will have almost nothing to work with.
Sonic farts at one point. When Tom asks what he ate, Sonic replies that it was a chili dog.
A creature on Tatooine fart in Jar Jar's face. Make us feel unclean just thinking about it.
An earlier scene also has Jar Jar accidentally stepping in what appears to be fresh bantha dung.
Jar Jar: Ohh! Icky, icky goo!
Strays (2023) is FULL of jokes about the canine characters peeing, pooping, and vomiting. There's even an entire montage of the dogs pooping at one point (they're in the pound and poop so the worker will clean up their area and they can escape)
Sweetie: Gordon says Sweetie can’t stay in the car all day because sooner or later she’ll need to go in the house to use the bathroom. Sweetie defies this by peeing in the driveway.
The Australian film Ten Canoes opens with several minutes of Scenery Porn of the Top End region, while the narrator rhapsodizes about what the country was like before "civilization" came. We zoom in on a hunting party, walking single file through the forest, when one shouts for the others to stop.
I refuse to walk in back. Someone up ahead keeps farting!
It's funny enough, but it also helps avoid portraying the tribespeople as some kind of idealized Noble Savages from an idealized past; they're people, with all of the ordinary feelings and... functions that go along with that.
Thunderpants, a film about a kid who farts a lot. It's basically fart and toilet jokes all the way through.
In a very unlikely place to find this trope, 2001: A Space Odyssey has a scene where Floyd is reading a long, detailed list of instructions on how to use the Zero Gravity Toilet. Part of the reason why this works is because it's actually Truth in Television. Real-life Zero Gravity toilets are insanely complex and require a ton of training to use properly. A casual passenger would require such a set of instructions.
in Blazing Saddles features a crew of cowboys eating beans and delivering a storm of farts and belches. The scene was actually considered edgy in its day. It's rather surreally subverted by the early television broadcasts of the film though, as the sound effects for that scene were removed by the censors, leaving a two-minute sequence of cowboys sat round campfires eating and periodically standing up then sitting again, while the fires flare slightly. Later versions had horses whinnying when they stood up, which was even more surreal.