An acronym for the expression "fuck your shit nigger". Commonly used when the loss of a video game, namely Call of Duty, occurs.
Bob loses game of one-vs-one against Jack
Bob:FYSN
Jack: :(
by michaelbayday June 11, 2011
Fuck Yo Shit Nigga
guy :DUDE STOP BEATING ME
Abuser : FYSN BITCH
hashtag on twitter <3 <3 <3
by Mr. Bigdick July 03, 2012

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