Biff Howard Tannen is a fictional character in the Back to the Future is a 1985 American science fiction film directed by Robert Zemeckis and written by Zemeckis and Bob Gale. It stars Michael J. Fox as teenager Marty McFly, who accidentally travels back in... trilogy. Thomas F. Wilson plays Biff in all three films as well as the Universal Studios ride, and voiced the character in the animated series. Biff is the main antagonist of the first and second films. Biff’s great-grandfather, Buford “Mad Dog” Tannen, fills a similar role in the third.
The character is portrayed as a towering, violent and aggressive sinister bully who obtains what he wants by intimidating others into doing his work for him, or by cheating. He and his family members are shown to misuse idioms in a way that makes them appear stupid and pathetic despite their intention to insult or scare. His favorite insult is “butthead”.