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Fans Of Garden State. The movie starring Zach Braff and Natalie Portman. It is used by indie wannabees to describe themselves.
I'm a F.O.G.S. see how cool i am?
by Tyler April 16, 2005
First Online Game Syndrome.
Thinking that Everyquest was the best MMO to date. Similarly, thinking that CS 1.6 is better than modern shooters and CS:S was a pile of shit.

Young gamer: "Modern Warfare 2 is the best call of duty, Black Ops and Modern Warfare 3 are shit"

Wise gamer: "You have a huge case of F.O.G.S."
by MisterMartinez October 14, 2011