look up any word, like twoosh:
 
1.
SFN
Literally means Skeet-Faced Negro and is a general derogatory term that can be used in any situation.
Yo Big Col, I can't believed you raped my girlfriend! Your such a SFN!
by dubz all day November 06, 2009
 
2.
SFN
1) 3 Letter Acronym for "Stupid Fucking Noob"
"OMFG! STFU! SFN!"
"Beginners luck, SFN"
by N4rF February 09, 2003