The act of fake pissing by way of warm water surreptitiously poured on a passed out friend. Bonus points for getting them in the face! Ideally this is a 2 man job - 1 to pour the warm water and a second person to zip up their own zipper. As the person awakes, they'll notice the person zipping up their fly rather than the person that poured warm water (a la mock pee) and will likely freak out - especially if they're in a drunken fog.

Caution: payback is a bitch. You don't want the victim of a mock-pee incident to return the favour with real urine.

the whale tail is the shape formed when a g-string rides up high over a womans trousers