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 July 24, 2008
Shove it up your fucking ass
by Steve-no June 16, 2005