A "Big Useless Fuck." Usually a huge guy on roids that never really helps anyone do anything simply because he's too busy looking in a mirror.
Girl: Can you get Joe to help me carry my furniture into my room?
Guy: I tried but he's being a BUF.
Guy: I tried but he's being a BUF.
by LeanN'Jacked August 26, 2010

damn shorty, you be buffing?
by hayzemarie December 10, 2007

by icewolf511 July 25, 2012

by Dicky-Dick November 1, 2007

Stands for Babe Under Fat. It is when a fat girl has the capability to be good-looking if she lost the weight.
by MakerofBuf September 14, 2009

by Gnarly Goat February 19, 2005

Have your remembered to clean your buf?
by ManneSaft December 17, 2021
