1 definition by LeanN'Jacked
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