An Acronym used by Strategy gamers, usually after pwning a noob, n00b, or newb. The Acronym itself stands for 'George Foreman Grill', but it has also been used in the context of 'Good Fucking Game'. Usually used as a derogatory term or as a pre-game insult.
2. GFG no Re kthx.
3. Fool I'ma GFG you this round
a control statement that indicates a woman has done something sexually pleasing for a man...either at his direction or maybe on her own.
(gfg is also sometimes confused with "good fucking game")