GGXX is an abbreviation for good game times ten. XX represent times ten, where by the first x is the multipication symbol and the second X is the roman numeral ten.

GGXX is to further emphasize and magnify the effect of 'good game'. For the defintion of good game, please search it seperately.
Justin: OMG, I have a 30 page paper due tomorrow at noon and I have not even started yet!

John: GGXX, wish you all the best.
by Anderson Tanoto March 2, 2008
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Good game times ten. Often used after games of Fifa 2007, especially after consistently pwn-ing your friends day after day, night after night. Usually said in a provoking, taunting manner...
Wow Anderson, its 9-1 in injury time...GGXX BRO
Lost for the tenth time in a row to Arsenal...GGXX
Looks like I dangled ur ass, GGXX
GAY GOAL GGXX!!!!
Anderson...GGXX
by Mr. T. Henry March 5, 2008
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Good game times ten. Often used after games of Fifa 2007, especially after consistently pwn-ing your friends day after day, night after night. Usually said in a provoking, taunting manner...

*look up the Fifa definition of GG...
Wow Anderson, its 9-1 in injury time...GGXX BRO

Lost for the tenth time in a row to Arsenal...GGXX

Looks like I dangled ur ass, GGXX

GAY GOAL GGXX!!!!

Anderson...GGXX
by Mr. Henry March 5, 2008
Get the ggxx mug.