Young Biff: Why don't you make like a tree and get out of here.
Old Biff: IT'S LEAVE! Make like a tree and Leave, you sound like moron.
A movie villain such as Biff had rarely been seen before. A bumbling idiot who barely makes sense, and harasses women on the regular, Biff Tannen is a piece of work.
Usually we see films with bad-guy having a slue of idiot Hench men. Not Biff, he does his own idiot stuff on his own. He even supplies the womanizing and ass kicking. It's to bad his sweet ride gets covered in cow crap, and beat up by George McFly.
We are also lucky enough to to see six different biff's
1955 Biff
1985 pre- time travel Biff
1985 Post time travel
Alt universe Biff
Future Biff
And my personal favorite Buford "Mad Dog" Tannen
For all these characters who are so hilariously played Biff is my seconded favorite charcter in these films next to Marty.
Who couldn't love a bumbling idiot who hits on Loraine relentlessly or changed the future for the worse, or killed George McFly in the Alt universe.
Biff: That's about as funny as a screen door on a battle ship
Marty: It's a screen door on a submarine, you dork.