to fall down in a spectacularly embarassing manner
whoa, you biff it like, twice a day on those stairs
by ipodgurl January 02, 2008
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To screw up, wipe out, or otherwise make a mistake.
Guy #1: <falls off bike> OW! Shit, man!

Guy #2: Dude, you biffed!

by laura jane December 21, 2006
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a northen term for cigarette, but can also be used to discribe a "joint"
"lend me a biff mate?"

"shall i roll a biff?"
by loomer August 30, 2007
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Adjective used to describe someone who requires little intelligence for their job.
Sam got a biff job at a warehouse yesterday.
by jessemmott08 October 02, 2010
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