Someone urinates (or, occasionally, defecates) in a swimming pool, either by accident or on purpose. If it's an accident, it's also a Potty Failure. Usually in cases of urinating on purpose, the offender believes that because the water is chlorinated it will clean itself... or they're that much of a jerkass that they just don't care. This is almost always Played for Laughs, but it can be Played for Drama if needed. This is one way to put some Toilet Humor into a work.
Fish, whether in tanks, aquariums, lakes, rivers, oceans, and ponds, relieve themselves in the water they live in by default. Ducks and other waterfowl swimming in ponds and lakes naturally relieve themselves in water. These animals can also use the trope to put some Toilet Humor in a work.
- Eveybody Pees, which is an ad encouraging getting a kidney checkup, has a song all about peeing. It is laden with Toilet Humor and lists all kinds of weird places to pee. The first few lyrics go "I can do it in a lake and I have to when I wake, maybe in a local pool, or in a bath will do, but everybody pees, everybody pees, so let's be sure to keep our kidneys healthy.
- Occurs in this commercial for tax preparation software, after a metaphor-laden Potty Emergency.
- In Love and Rockets, the Nouveau Riche Norma Luna's pool party for her new neighbours is ruined when her drunken boyfriend skinny-dips and then pees in the water, which had been treated with a chemical that turns urine red (as per the urban legend; see below).
- In Le Petit Spirou, Spirou and his friends are in a pool at a public bath and discuss if such a chemical is used that marks urine in the water with a color. One of them says something like, "Maybe elsewhere, but definitely not here." Cue Spirou deciding to stay outside the pool.
- Subverted in Caddyshack. When a child throws a chocolate bar into the pool, everyone assumes that it is a large turd, causing a major overreaction from everyone.
- In Diary of a Wimpy Kid: Dog Days, Manny pees in the pool as a joke.
- In Grown Ups, Eric causes chaos at a waterpark when he discovers that they really do put a chemical into the water that turns urine blue.
- One of the most memorable scenes in The Inbetweeners 2 features Neil accidentally defecating down a waterslide as a result of irritable bowel syndrome. The turd chases Will down the slide and hits him in the face at the bottom.
- The pre-title sequence of the Australian comedy You and Your Stupid Mate culminates with one of the two main characters relieving himself in the pool. The lifeguard yells at them both, delivering a Title Drop in the process.
- In Finding Nemo Gurgle once says about the dirty tank that "Don't you realize we are swimming in our own—-?!" but was interrupted, implying they relieved themselves in the water.
- In Moana, Maui pees into the ocean while Moana has her hand in it on the other end of the boat.
- Bud Not Buddy: At the YMCA, one of the employees announces that the pool has been treated with a chemical that turns urine red and burns the user as a punishment. Bud is offended that the employee would even assume that he would pee in the pool in the first place.
- In one of Dave Barry's books, he mentions the fact that people pee in pools. Paraphrased:
- In Diary of a Wimpy Kid: Dog Days, Greg mentions that he used to swim in the baby pool until a kid said "I'm peeing" while in it, which put him off. His reason for not liking the ocean is because "All the world's fish and turtles and whales go to the bathroom right there in the ocean."
- A lifeguard yelling at a poolgoer:
Sir! Please stop peeing in the pool!
Come on, man everyone does that!
Not from the diving board!
- The water was so cold that day, that the toilets on the beach had queues.
- In one Crank Yankers sketch, Special Ed calls up a health club and tearfully apologizes to the manager for having peed in the pool.
- Implied (but probably not actually done) in this prank from The Jamey Kennedy Experiment.
- On Friends, Monica was once making out with Richard when she blurted out, "I can't believe I'm kissing the man whose pool I once peed in." This gets a Too Much Information response from him.
- In one episode of Buffy the Vampire Slayer, Jonathan Levinson admits to peeing in the swim team's pool as revenge for the swim team bullying him.
- The Adventures of Pete & Pete episode "Splashdown" had the urban legend of a urine-detecting pool chemical come to life via "Wee-Wee See", which is used to bust a peeing perpetrator.
- Invoked in The Worst Year of My Life, Again. The urban legend of a chemical that turns purple in contact with urine being added to pool water is mentioned, with Simon pointing out that it is a urban legend. Later Sam dumps a purple drink on Simon while he is in the pool, leaving him surrounded by a rapidly spreading circle of purple. Simon tries desperately to tell everyone around him that he has not peed in the pool.
- On The Goldbergs, Adam is self-conscious at having to take swimming classes in school, so, inspired by Caddyshack, he throws a chocolate bar in the pool so that class might be canceled. This leads to the pool being drained and the coach punishing everyone until the real culprit confesses.
- Played with on an episode of America's Funniest Home Videos. When Tom is introducing a series of pool clips he warns "Don't make the water around where you're swimming suddenly, mysteriously, curiously, warm..."
- For one punishment on Impractical Jokers, Joe had to go into a swimming pool and loudly announce to everyone there that he's peeing in the pool
- Singer-songwriter Jim Croce mentions this between songs on a live concert recording (Jim Croce Live: The Final Tour from Saja Records): "It's like peein' in the pool. Everybody's done it."
- Bryant Oden writes children's songs. One of them is titled Please Don't Pee in the Pool.
- Calvin and Hobbes: When Calvin refuses to allow Hobbes to share his swimming pool, Hobbes retaliates by deliberately shedding fur in the water, prompting Calvin to get out in disgust. Hobbes' victory is short-lived when Calvin implies that he invoked the trope before getting out.
- Zits uses this when Jeremy and Hector spend a summer working as lifeguards and swimming instructors at the local pool.
Jeremy: Look at the kids Hector! They're swimming! I feel accomplished! I feel great!
Hector: I feel a warm spot.
Jeremy: I quit.
- An early Pro Wrestling Guerrilla event was named "Kee The ee Out Of Our ool".
- Jim Gaffigan made this joke in his album Mr. Universe in an extended bit on hotels, stating that anytime you are in a hotel pool with children you are "swimming in a toilet"
The first time a kid can multitask. "I can play and pee?"
- There is a legend commonly told by parents to their children of a chemical that turns urine a cloudy purple (sometimes red) when mixed with it, pointing out the offender to the pool owner and the other patrons. This story fooled a lot of kids before the advent of the internet.
- Sam & Mickey: In "The Return", it's revealed that Barbie is banned from a mall for 5 years thanks to an incident where she allegedly urinated in the water fountain. The Stinger gives credence to it via security camera footage.
- An interesting variant occurs in Episode 17 of Dr. Havoc's Diary; first, we have Brock shooting Havoc's henchmen dead, but No Dead Body Poops is averted. Then the submarine begins flooding and sinking thanks to Brock cutting a hole in the side of said submarine in order to get inside in the first place, which leads right to...
Havoc: (both cling onto the metal pipes on the ceiling) Well, this is great, Brock. Now, we have to escape from what is essentially a giant, unflushed toilet. (sighs) So, you wanna swim through the shit first, or should I?Brock: Im gonna be honest. I-Id kinda rather be here than at home with that nightmare on wheels you call a wife (Kim). (points to a floating corpse.) Ahh, poopy body! Poopy body!Havoc: Shut up.
- In this Penny Arcade, the two main characters are in a swimming pool with children, and one of them ponders just how much of the swimming pool's water is actually baby pee. The other responds that they're actually in a play structure.
- In this Cyanide and Happiness, two guys are in a pool, and one finds a "candy bar" floating in the water. It really was a candy bar... Once.
- In The Adventures of Jimmy Neutron: Boy Genius episode "Who Framed Jimmy Neutron?", Jimmy, Carl, and Sheen attempt to escape from jail and hide inside a pool during the night. When they lose the guards, Jimmy tells Carl that he can use the restroom, only for Carl to say that he doesn't have to go anymore.
- In the American Dad! episode "An Incident at Owl Creek" Stan cannonballs into a pool and accidentally craps himself in front of everyone.
- Camp Lazlo has Edward preventing Lazlo from using any signs of restrooms after the latter beats the former in a lemon drinking contest. One of the places in question is in the middle of Leaky Lake, which Lazlo raises by twice its height when relieving himself. A fish, really Edward in a fish suit, asks Lazlo not to pee in the lake, so Lazlo sucks the large amount of urine back into his bladder before apologizing to the fish and leaving the lake. Ouch.
- In Futurama, Fry meets and dates a mermaid named Umbriel when the crew is dragged underwater by a Colossal-Mouthed Bass. He then relieves himself right in front of her, prompting her to ask if the water got warmer. They then rest near a volcanic vent, where Fry relieves himself once again. This then prompts Umbriel to ask if the water got colder. Later lampshaded when Zoidberg tracks Fry down.
- Implied in an episode of The Simpsons as part of a Noodle Incident: When Marge and the kids are seen leaving a public pool, Marge tells Lisa that she shouldn't have loudly announced that Maggie did something in the pool and instead quietly told her and "let the chemicals deal with it."
- Played with in Rugrats. In the episode The Big Flush, none of the Rugrats actually go potty or use their diapers while swimming, but they do reckon the swimming pool is a "giant potty" and when Chuckie says the pool water tastes funny, Tommy says "Of course it tastes bad, Chuckie! It's potty water!"
- South Park:
- In the aptly named episode "Pee", the entire plot revolves around this when a waterpark reaches critical urine mass and turns into a massive pee tsunami, trapping everyone inside the park.
- In "Summer Sucks", Cartman is forced to take swimming lessons with first graders, and is mocked by Stan who claims the first graders all pee in the pool. True to Stan's prediction, whenever Cartman must pass by them, the water turns yellow as the children pee in the pool. Many "Oh, weak!" comments from Cartman ensue. When the pool reopens after the giant ash snake is put out, the first graders return and immediately turn the entire pool yellow, much to the anger of Cartman who had been using the closed pool to practice swimming in peace.
- An early episode of Beavis And Butthead has Beavis accidentally fall into a pool of sharks. He pees in the pool, setting off an alarm, ensuring he'll be rescued before the sharks eat him. Later, Butt-Head asks Beavis if he peed because he was smart or because he was scared. Beavis says he did it because it feels good. Butt-Head agrees; "That's why I pee in the pool!"
- Total Drama:
- On Island, Izzy pees in the resort pool, justifying it by stating that the water is chlorinated.
- Owen does this at least once in World Tour.
- Bob's Burgers: In "Synchronized Swimming", a pool is cleared when a turd is seen floating in the water. Bob thinks Louise pulled a Caddyshack and put a chocolate bar in the pool... only Louise hasn't seen Caddyshack; she was just that desperate to get out of doing a synchronized swimming routine she hadn't practiced for.
- In the Star vs. the Forces of Evil episode "Mewberty", the swim team is shown training in the hallway and mention that someone pooped in the pool.
- Almost Naked Animals: This exchange from "The Rotation Situation":
Howie: Oh Bunny! You and your rules. 'No bathing in the pool'. Next you'll be saying you're not allowed to relieve yourself in the pool.
Bunny: (angrily) You're not!
Howie and Duck: (in unison) Oh.
- Family Guy:
Cleveland: Oh, that's nasty!
- In "Mind over Murder", Peter talks about some of the "crimes" he's committed in his life, like loitering, peeing in the pool, and sneaking into Wimbledon (the joke being that all three scenes use the same animation of Peter standing still while his eyes nervously dart left and right). Later on he wonders what Cleveland and Quagmire are up to; cut to the two men at the swimming pool, with Quagmire's eyes darting left and right.
Peter: Hey, Chris, did the water just get warmer all of a sudden?
- Subverted in "Peter's Daughter", when the Griffins' house gets flooded:
Chris: Uh, no, Dad.
Peter: Oh, that's right. It's pee that's makes it warmer.
- The pilot episode of Codename: Kids Next Door "No P in the Ool" references this. With adults taking over the main pool, the KND is forced to go to the kiddie pool; Numbuh 3 mentions that the water is "nice and warm", and the others look suspiciously at the little kids surrounding them.
- In The Loud House episode "Linc or Swim", Lisa uses a formula that eliminates urine in the pool; when all the water evaporates, the rest of Lincoln's sisters blush in embarrassment.
- The main protagonist of the Disney short Inner Workings pees in the water at the beach when he sees a big wave.
- In the SpongeBob SquarePants episode "Mid-Life Crustacean", one of the "wild and crazy hot-blooded" things SpongeBob and Patrick make Mr. Krabs do is sit in an inflatable kiddy pool. They ask him if he's "feeling it", and he says he's not but he's "feeling a warm spot."
- Alluded to in the Steven Universe episode "Keystone Motel". Steven tries to get an irate Ruby to join him in the motel pool, but all she does is pace back and forth along the bottom of the pool while grumbling. Since she's literally Burning with Anger, Steven teasingly comments that she "made a warm spot", though the water quickly turns hot enough that Steven has to get out to avoid getting scalded.
- Sign on the wall at Lower Wick swimming pool, Worcester, England: "WE DO NOT SWIM IN YOUR TOILET SO PLEASE DO NOT WEE IN OUR POOL"
- The page quote is sending up a real, if uncommon, poolside sign that says "Welcome to our OOL. Notice there is no P. Please keep it that way."