Definitions by Max Mather

biff 

1. To have sexual intercourses with another creature; usually human

2. To masterbate

3. To ejaculate

1. "Max biffed katie last night; its not awkward at all"

2. "I just biffed one out"

3. "Apparently billy biffed all over his face."

biff by Max Mather December 15, 2010