Definitions by DarthSlymer

GUMF 

An acronym for the phrase, Goofy Ugly Mother Fucker. The word is used when it would be innapropriate to say, "Goofy, Ugly, Mother Fucker" aloud.

Dave: "Oh my god, look at that GUMF over there!"
Chris:"Shit's hurtin' my eyes! Lets get out of here!"

GUMF by DarthSlymer July 13, 2011