When the bottom of a persons ass cheeks are not covered by their bikini because the ass crack gobbles them up or because of the ass is full and can't be contained.
A atrocious fart that comes out your buttox between your right and left booty cheeks. To prevent sound you lean forward and shove your buttox backward, then sit as fast as you can, flat, to prevent a really ear-rippling sound that your comrades will hear.
Johnny hit a middle cheek leak in the middle of class and his ass cheeks wobbled back and forth.
The whole class turned to Johnny cause he forgot to sit down fast, and everyone heard and smelt his atrocious fart.
Ruler of Lake Titicaca. Rumored to have a bunghole that gets very angry if it does not receive toilet paper. Cornholio the Great is often seen walking around with his shirt over his head and his hands in the air, chanting songs about his power, and his bunghole.
"I am Cornholio! You do not want to face the wrath of my bunghole, for I need TP!"
Butthead: Shut up, Beavis! (uh huh huh huh)
Beavis: Um, okay. (heh heh heh heh).