Top definition
Stands for "Shut the fuck up, neilson", which is a phrase commonly used by anyone but is directed to someone with the characteristics of neilson. See neilson.
First Blood (+200 gold)
br_gamer: gjgj
youlikemen: STFUN
br_gamer: wtf??
by michael johnson2 November 28, 2006
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2
"STFUN"
"what does that mean"
"hahaha what a noob"
by Dustout January 22, 2007
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3
noob your gay stufn!!!!!!!!!
by anarchy 99 February 01, 2005
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4
Willis: Hey Guess what?
Tim: STFUN
by Tetsiga August 04, 2005
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