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U-571 (aka "The Depthcharge") - When a person in an outdoor toilet climbs as high as possible on the walls and unloads, hopefully, into the urnal below... If chili or beer was involved and the toilet is splattered , you scream "You sank my battleship!" - Mike B, New York

Under Dog - After a hard session at the gym, your armpit muscle begins to twitch; thus giving you the ability to jerk a guy off with your armpit muscle.

Under Drinker - You have plenty of girl's come to a party, you spill all your drink. Then, wait for the girls to get drunk, take advantage of them and then you can still remember the night! - Kyle & Chris, Indiana

Undertaker - Persuade your girl to lie in a bathtub full of ice water (this is the difficult part). Once she is nice and cold and clammy. Lift her out (make sure to tell her to pretend to be completely limp and flacid). Lay her on the kitchen floor and proceed to fuck her motionless body. Once finished, fill her full of embalming fluid and bury in the back yard. - T-Bone, Ohio

Unexpected Chinese Firedrill - As your doing a routine Chinese Firedrill (when the car stops everyone gets out and runs around the car and gets back in) you clothesline the kid in the car that you hate and as they're knocked out, drive away without them. - Big Johns, Assumption College

Uphill Gardener (aka "Shit Stabber", "Anal Invader") - One who enjoys poking around in the chocolate starfish. - Mitch, South Carolina

Upper Decking - The act of removing the lid of a toilet and taking a deep shit in the tank. Every time the toilet is flushed after that brown, shitty water comes out leaving the owner wondering "what the fuck is wrong with my plumbing?" The trick is to wipe and throw the toilet papet in the bowl forcing them to flush. Perfect for parties and bars. - Dan, Nebraska

Up on Blocks - When a women is on her Period, The term comes from a car under service. It is undrivable because it is "up on blocks"

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