|“||Since you're new here, I'm gonna cut you a break... today. So why don't you make like a tree... and get outta here!||„|
|~ Biff to Marty|
Biff Tannen is the main antagonist of Back to the Future and Back to the Future Part II. He is the great-grandson of Mad Dog Tannen and the future grandfather to Griff Tannen.
He is portrayed by Thomas F. Wilson.
Biff is a large, rude, arrogant and violent bully who obtains what he wants by intimidating others into doing his work for him, or by cheating. He and his family members have a tendency to misuse idioms in a way that makes them appear foolish and comical despite their intention to insult or intimidate, and all share a disdain for manure. His favorite insult is "butthead".