Biff was born in Hill Valley, California. He is the great-grandson of Buford "Mad Dog" Tannen and grandfather of Griff Tannen. Rather than studying in high school, he prefers to bully George McFly into doing his homework for him while he drinks and hangs out with his friends. Feared by most of his schoolmates, he is less brave without his gang (Match, Skinhead, and 3-D). The only person at Hill Valley High school that Biff is afraid of is Mr. Strickland. He has been living with his grandmother, Gertrude Tannen, at 1809 Mason Street for some time by November 1955.
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