This is the trope where a character drools while sleeping in a noticeable display of comedy. In some cases, drooling can be used to indicate innocence, since, commonly, small children tend to drool while they're asleep. When adults do this, it's supposed to portray them as inelegant and crude, especially with females. Then again, when women do it, it can be considered as cute while male droolers are considered to be very childish.
This can be justified by the fact they are a Heavy Sleeper. There's an indication that whenever a character drools at sleep, it shows that the sleeper is mentally dumb, and/or socially awkward (rarely Book Dumb). This could also happen if they're dreaming about food. Pretty much everyone does this at one point.
- In Sword Art Online, Asuna catches Kirito napping and reads him the riot act, but he convinces her to take a break and she takes a nap. When she wakes up, she's drooling and has grass stuck to her face.
- The Quintessential Quintuplets:
- Nino sports one in Chapter 14, when Fuutarou enters her room while she's still asleep to ask her to give him back his notebook.
- In Chapter 86, all five sisters fall asleep together in the bus, and Yotsuba is the only one who's drooling.
- Jonathan Joestar, The First JoJo: Done multiple times by Jonathan, much to his embarrassment.
- In My Dream Is Yours, Olympia finds some drool on her shoulder when she wakes up from her impromptu nap at the park with Otis. She's not sure if it's her own drool or if it was Otis's, with his head on her shoulder.
- Dopey from Snow White and the Seven Dwarfs does this after crying in his sleep.
- Frozen: After a lengthy tracking shot through Arendelle of dignitaries arriving for Elsa's official coronation as Queen, two of them are heard talking about how beautiful the (soon-to-be) Queen and her sister, Princess Anna, are. The scene then smash-cuts to Anna still fast asleep in bed, sporting a terrible case of bedhead (with some of her hair in her mouth) and a visible trace of drool.
- In Ferris Bueller's Day Off, at least one student sleeping in Ben Stein's class has a visible trail of drool on his desk.
- Galaxy Quest: There is saliva drooling out of Jason's mouth when he first wakes up on the ship.
- This appears in the first Percy Jackson and the Olympians book as a way to establish Annabeth and Percy's Frenemies -> Vitriolic Best Buds relationship. Annabeth is tending Percy after his battle with the Minotaur. He expects her to compliment him; instead, she says, "You drool in your sleep."
- Prophecy Approved Companion: From the first chapter:
She wrenched open his front door and immediately saw him. The shining Hero of the known world. The one she had trained her entire life to walk beside. Her destiny.
Who was currently fast asleep half off his bed, drool forming a small puddle on the ground.
- Mentioned, though not shown, in an episode of Buffy the Vampire Slayer.
Buffy: Did anyone notice that I was asleep?
Willow: Very discreet, minimal drool.
- In the k-drama 힘쎈여자 도봉순 (Strong Woman Do Bong Soon), a flashback shows her first meeting with her deep crush, In Guk Doo: Bong Soon is asleep in class with her head on her arm when Guk Doo walks in as a new transfer. She stares at him in awe, completely smitten, as he takes the remaining empty seat next to him, only for him to awkwardly point out the trickle of drool on the side of her face, causing the rest of the class to laugh. This sets up years of Bong Soon pining (apparently) one-sidedly for Guk Doo while he treats her like a sister.
- Babylon 5: One Mimbari ritual involves watching your loved one sleep, leading to a comment from Sheridan about how romantic it is to be staring at someone drooling on their pillow.
- Kaeloo: Happens when any character, even one who is considered "elegant", falls asleep.
- My Life as a Teenage Robot: While waiting for Sheldon and Brad to finish removing Jennys parts in the episode Victim of Fashion, Tuck eventually dozes off and drools all over the floor in front of him (from the roof of his mouth as opposed to his lower lip or the side of his mouth, like most people, curiously).
- Homer Simpson from The Simpsons:
- In one episode a robber breaks in and the family is tied up while they're all in bed asleep and brought to the living room. Lisa looks at Homer drooling. "Oh, no, dad's been drugged!" Marge: "No he hasn't."
- In another episode Homer thinks he has eaten some poisonous blowfish and has 24 hours to live. He stays up that night listening to The Bible on tape read by Larry King. Marge finds him the next morning and starts to weep - but then realizes "his drool! It's still warm! Oh, Homie!"
- Another example comes from "Treehouse of Horror II", where Homer's brain is placed in a robot and the robot proceeds to sleep and drool oil.
- South Park: In the episode Guitar Queer-O, when Stan passes out while playing Heroin Hero, he is shown to have a line of drool oozing from the corner of his mouth.
- Patrick from SpongeBob SquarePants pretty much does this every time hes asleep, most especially in "Home Sweet Pineapple" where Spongebob had to spend the night at his house while his pineapple home was eaten by nematodes, absorbing all of the saliva coming out of Patrick's mouth.
- Sandy is also prone to this, with the two prime examples being during her hibernation in Survival of the Idiots and once shes sleeping at the end of Prehibernation Week.
- Even Spongebob himself drools in his sleep every once in a while. At the beginning of I Was a Teenage Gary, he drools while asleep in his chair, and in Welcome to the Chum Bucket, he falls asleep in the middle of Planktons story and drools right on the latters head.
- Total Drama: In "Anything Yukon Do, I Can Do Better", Heather enjoys a solid nap in first class with a sleep mask and some drool slipping out of her mouth.
- One of Dave Barry's columns features a related phenomenon when he's sick with the flu:
"Another symptom is that you cease brushing your teeth because (a) your teeth hurt and (b) you lack the strength. Midway through the brushing process, you'd have to lie down in front of the sink to rest for a couple of hours, and rivulets of toothpaste foam would dribble sideways out of your mouth, eventually hardening into crusty little toothpaste stalagmites that would bond your head permanently to the bathroom floor."
- In one of his books, Bill Bryson admits that he tends to sleep like this, at least while traveling.