The small area of skin between a woman's cunt and asshole where a guy's balls slap against when he is fucking her
Boy, Mary's biffing plate got a good hammering last night
by sanddevil November 3, 2008
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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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