Overused to the point of vulgarity abbreviation intended to stand for "good game." When people say it no matter what (especially when the winners say it), it dilutes the phrase to the point of meaninglessness. They might as well just say "hahah we kicked your asses."

Come on people, if it was a good game, say "damn that was a good game."

If it was shitty or merely mediocre, don't dilute a phrase that could be used as a compliment if it didn't mean jack squat.

1. Standing for "Good Game", it is usually said after a round or match of a game as a show of good sportsmanship.

2. Might also be used as another way of saying, "Good Going" or "Nice Job".

Good Game, Usually used in games and gamers use them. When its end of a game, people usually say GG to say "Good Game"

When pronounced ("Gee-gee"), sounds like the slang term for "penis" in Chinese Mandarin.

it basically means "gang gang"

Good
Game

Slang phrase derived from Good Game with roots in the gamer lexicon. Used to describe an item, place or situation as being great or excellent.