1 definition by Trevor Normington
A front-bum is when you need to tuck your gut in the front of your pants...thus making it look like a butt.
Tom: wow look at that chicks ass
Joe: Dude thats a front-bum
Tom: oh man she had to of been there awhile stuffin that beast in.
Joe: Dude thats a front-bum
Tom: oh man she had to of been there awhile stuffin that beast in.
by Trevor Normington March 12, 2006