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1.
SUF
Steam(Powered)Users Forums.

The Steam Forums are owned by the Valve Corporation.

A forum to discuss Valve/Steam Games such as Half-life, Half-Life 2, Counter-Strike, Counter-Strike: Source, Day of Defeat...etc.

Many People use the Acronym SPUF But According to one of the Steam Powered Forum Mods (Blinxx), the correct Acronym is "SUF."
SP User: Long Live SPUF!!!!!!!!!!

Blinxx: Sorry Sir, It's "SUF"
by Average Joe89 August 20, 2006
 
2.
suf
Abbr. for "shut up forever," for when "stfu" is not enough.
Sam: "insert increasingly stupid remark here"
Everybody else: "God, Sam, suf."
by WADE wade WADE November 13, 2011
 
3.
SUF
Shut Up Fucker
hey, you were so drunk last night!

Oh just SUF
by absofuckinlutelycooleo January 29, 2010
 
4.
SUF
The Secret Unicorns Forum, the now official Unicorns(the band) fan site/website.
"Man, today on SUF I found a bootleg of The Unicorns' 2004 performance at Rhino's, it was badass."
by Jake Mcgoogle May 04, 2009
 
5.
suf
Abbreviated form of "shut ur face."
jus suf bitch
by Steve P March 18, 2004
 
6.
SUF
Acronym for Structurally Ugly Face. Only used in exceptional circumstances.
Andy is such a SUF that the bouncer refused to let him in the club!
by ANON February 22, 2005