Biffen is some sort of a game. To start you put a sausage into you partners anus. After this your partner tries to shoot the sausage in your own mouth by contractions of the circus muscles of the anus.
A cocktail, usually mixed in two 16-oz solo cups, which is made strong for the sole purpose of drinking oneself retarded. Also referred to as a "stiffington" or "stiffy" for short.