Biff Forums › Terminology › Biff Tagged: slang This topic has 0 replies, 1 voice, and was last updated 14 years, 9 months ago by Frosty. Log In Register Lost Password Viewing 1 post (of 1 total) Author Posts March 12, 2010 at 6:04 pm #463 FrostyKeymaster Biff: A slang term meaning to crash or fall. “Dude, I totally biffed it back there.” i.e. bail, wipeout, bite it, eat s&!t Author Posts Log In Register Lost Password Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Sign Up Log In