Definitions by The Lindenhurst Crew

U.B 

When you have an "Uncontrollable Boner" and need a hall pass to leave class early, commonly used as a nickname

Man 1: Hey, Whats your name?
Man 2: People call me U.B.
Man 1: Whys that?
Man 2: I CANT CONTROL MY COCK.

U.B by The Lindenhurst Crew April 3, 2008