Stiff Biffy

What is Stiff Biffy?


1.

Having a fully erect penis while wearing sweat pants.

"Dude, I got early the other morn'n and went to hardee's for a biscuit only to look down and see that I was totally sport'n a stiff biffy. The cashier called the cops when she saw the head peak'n out."

See hard, on, sweat, pants, stiffy


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