Definitions by aussiedude85

Bun in his unit 

The unexpected pregnancy of a homosexual man and his partner, whereas the man falls pregnant and no female is used.

Guy 1 - Oh boy, is Bill getting fatter?
Guy 2 - No way, he has a bun in his unit!
Guy 1 - OMG!!!

Bun in his unit by aussiedude85 June 10, 2011