One who manifests much affection for the genre of shooting games; first person shooting games, to be fastidious.
Guy 1: "Dude, where that dweeb, Mark, at?"

Guy 2: "Probably in his basement, he got that new game, Modern Warfare 2."

Guy 3: "Wow... The dudes a complete FPSF."
by I am, Sam March 9, 2010
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fpsf

First
Person
Shooter
FREAK

Someone absurdly obsessed with first person shooters.
Guy 1: Man...all billy does is play Shooting games.
Guy 2: Yea hes a fpsf.
by wikkidessohbee March 5, 2010
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