1 definition by TheLastCrusade

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"Mon" is "come on" in Scottish. "The Biff" is what fans call the Scottish rock band "Biffy Clyro". Mon the biff therefor means something like "Come on Biffy Clyro". Fans scream this at concerts just before the show and in between songs.
Mon the Biff
by TheLastCrusade October 31, 2013

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