Definitions by Herb Mo

brotherfucker 

A girl who fucks brothers especially her friends brothers. Like a motherfucker but instead a brotherfucker. The girl will usually still be in high school or senior school and her friends brother is usually a few years into their university course.

Man. I can't believe she slept with your brother last night. What a brotherfucker.

brotherfucker by Herb Mo May 28, 2008