SUFA stands for "Shut Up Fat Ass". It came into the internet world from the FFI forums when some one said shut up fat ass and then someone to joke around replied "SUFA!". Therfor the meaning of SUFA has come into internet talk ,but still isnt known by many.
by FFI Guy January 02, 2006
Shove it up your fucking ass
by Steve-no June 08, 2005