GGFO 

The angry replacement for "gg" (good game), meaning "good game, f*** off".

Used mainly in Starcraft 1 and 2, but can apply to any online game featuring text chat.

oGs. TheWind: gg
You: ggfo
oGs. TheWind has disconnected.
You: You mad?

GGFO by PerotecH December 2, 2010