Definitions by ChknWngz

Biff 

To slip, trip, fall, or generally mess something up. Generally resulting in embarrassment and regret.

Sam - slips in mud
Ryan - YOU GUYS, SAM JUST BIFFED IT!
Sam - Damn it! That was the worst biff ever, I'm fuckin' covered in mud!

Biff by ChknWngz April 20, 2016