a fast tempered, slow-witted jock, often when you look at the context of a bully. A Biff usually compensates for their decreased understanding with force or otherwise hostile action.The term hails from the bully in Back to the long run I and II who harassed George McFly not only in has last, and through the future. The intimate maneuver where a guy utilizes the pinnacle of their erect cock to vigorously knock 3 times on his lover's forehead and exclaim "Hello?! McFly?!", in mention of back into tomorrow Part II.