Biffing the cheddar is an ambiguous way of being coy about an action you will or have performed. These acts may be innocent, but are often conveyed with a sexual undertone.
Bro, I spent all night biffing the cheddar to Christi Boner.

Yo Alex! Hurry up in the shitter! What are you- biffing the cheddar in there!?
by GJ_Jerry_G August 12, 2023
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Bif Naked aka Beth Hopkins, is a fabulous female Canadian rock singer. She has featured on the Buffy soundtrack, and also apeared in a few movies.
"wow bif naked rawks!"
"your telling me!"
by Mark June 19, 2004
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The area of a chick's ass that a male's Jackson Pollocks hit off when he bangs her
I sat down on my sandwich.
Now it's flatter than Jenna's biffing plate.
by Theeph May 28, 2003
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A silly insult used by the Frogs to define the British, apparently because we eat too much roast beef.

(Note the lack of dashes)
Jacques: Tu es un ros bif!
Nigel: Qui a mangé toutes les tortes?
by Adam January 15, 2005
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To get extremely drunk on Slivovits (a Serbian plum brandy).
"Dude! You gotta help us!!! Mikey's losin it! He's running down the hallway in his friggin underwear screaming obcenities and stealing peoples spare change! He's slivo-biffed again!"
by Senator Jibbulosevich October 19, 2009
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Someone getting their rat/fanny/cock out.
"go on girl get ya bif out"
by Rate My Trout December 22, 2008
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To run away as fast as you can from a dangerous situation
"I was smashing my girl till her dad came in, and just biffed it out of there through the window
by Bläh October 27, 2016
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