Good Game. Depending on context, it is either insulting or polite. If GG is uttered after you've been utterly crushed in a game, then it is purely condescending and insulting; otherwise, it should be considered a polite remark.
I can't believe you managed to break through all my tanks, GG!
Good Game - You are getting OWNED.
also usable with -able
21:06 <Guruchild> jago
21:06 <Guruchild> you are ggable
21:06 <Guruchild> at any time
21:06 <Guruchild> remember that
a dose of gunpowder and colourant mixture which is placed on top of the butthole and combusts with a rapid expulsion of methane from sed butthole (otherwise known as a 'fart' or 'guff') to produce a pyrotechnical display, similar to the firework displays introduced to the world by the chinese.
dave's left and right buttcheeks were severely disfugured after a pyro flatuence show that went horrendously wrong, now u can see the face of har mar super star between the crack.
broken; dead in the water, floating
well that project really went tits up.
broken, fucked up, shit the bed, passed out.
Charolette was pissed off because her dildo went tits up.