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."
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?