U.B

when you get a bonner when you dont need one.
Unnecessary Bonner.

i had a U.B this morning when i woke up.

by mike.l July 9, 2006

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.

by The Lindenhurst Crew April 3, 2008

u.b

this means you got an uncontrolable boner!

damn man ive got a u.b

by ice kidd March 31, 2008

Uncle U.B

He’s everyone’s uncle and favorite Latin teacher in the universe. He’s just a straight up legend. God himself, he has arisen

Uncle U.B is Jesus reincarnated

by Quinn O’Brein January 10, 2019