GG
From Encyclopedia Dramatica
Stands for "good game". Typically used on IRC specifically insub.
Also used at the end of internets action games such as Half-Life, Deus Ex or Yahoo! Spades to signify that the game was fun. Some variations might include "gga" (good game all) or just "ggp" (good game partner). "gg nextmap" is also derived from these games, and outside such environments is synonymous with "pwned", like when niggers beat you at Mario Kart.
IRL a "good game" comment is usually followed with a pat on the person's ass. This is because most athletes are gay and see way too much man-on-man action.
[edit] Alternate Meaning
Stands for "good going", and is not a term of endearment. If you get this response, it means you've done something minorly fucktarded, to the lulz of your opponents.
[edit] Example
- Prima: I followed your advice and deleted system32
- Secunda: gg
- Prima: I just upgraded to Vista today.
- Secunda: gg