Biff Tannen

Biff Tannen first appears in 1955 Hill Valley as the schoolyard terror of Hill Valley High School. He is the great-grandson of the outlaw Buford "Mad Dog" Tannen and the grandfather of Griff Tannen, a pattern of bullying that spans generations. Biff's name was inspired by studio executive Ned Tanen, and his alternate-timeline persona in 1985 was based on real-estate magnate Donald Trump, as revealed by writer Bob Gale in 2015. Biff's defining method is physical intimidation and cheating, often forcing weaker kids like George McFly to do his homework. His go-to insult is "butthead," and he has a habit of mangling idioms, which makes him look foolish even when he's trying to be threatening. [edit]

Biff is a hulking, dim-witted bully who relies on brute force and underhanded tactics rather than genuine intelligence. He is aggressively self-serving, with a short temper and a sneering demeanor. Despite his tough exterior, he is easily flustered and quick to back down when confronted with real resistance. He has a strong dislike for manure, a detail that adds a comical layer to his otherwise menacing personality. His relationships are transactional, and he shows no genuine loyalty to anyone but himself. [edit]

In the original 1985 film, Biff is the primary antagonist, tormenting George McFly and attempting to assault Lorraine Baines. Marty McFly's intervention in 1955 changes history, turning Biff into a subservient auto-detailing employee by 1985. In Part II, Biff steals the DeLorean and gives his younger self a sports almanac, creating an alternate 1985 where he is a corrupt gambling magnate who married Lorraine and had George murdered. Marty and Doc Brown retrieve the almanac and burn it, restoring the timeline. In Part III, the story shifts to Buford Tannen, but Biff's legacy as a bully continues through his family. Biff's character arc shows that his power is always temporary and ultimately undone by the heroes.[edit]

Biff Tannen has become one of cinema's most recognizable bullies, transcending the films to become a cultural archetype. His catchphrase 'butthead' became iconic, though actor Thomas F. Wilson announced in January 2026 that he is 'done calling people butthead' in public. Michael J. Fox stated in October 2025 that the film remains relevant partly because of 'bully culture,' directly connecting Biff to contemporary social issues. The character's Wikipedia page receives about 18,000 views over 60 days, reflecting his enduring popularity.[edit]