The soft piece of skin between the vagina and the anus that your balls 'biff' against when blowing the back doors off a woman.
by Tuffty March 9, 2004
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Get the Biffins bridge mug.When a man inserts his thumb and middle finger into the vagina and anus of a woman and attempts to click his fingers. Used to determine the overall condition of a potential sexual partner’s pelvic floor.
I wasn’t sure, she was a bit old looking. But a quick biffins bridge rot test proved she was in good enough nick.
by Bob Clapperton July 2, 2023
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