the phrase "G" derives from gamerscore addicts. Achievement addicts or "achievement jockey's" use the term G as a
short name for gamerscore. These
people often shout G in an aggresive manner when unlocking achievements, some have
even been known to scream the phrase in normal life. these bursts of G are often followed by a mounting by the person, this often leaves the vicitm parylised for days.
Jack: "look at that, you got
30 gamerscore for that achievment, fuck yeah!"
Matt: "G G G, i need to mount
something like a fucking whore" 'the
jockey then begins mounting the nearest person or object'