Guy-gax Share definition Flag A large group of men, generally geeks or nerds. "Hey look at the size of that Guy-gax, I hope I can join." said the man as he pointed at the group of men playing Super Smash Brothers. Guy-gax by Omywa Kuruse March 18, 2008 0 0 Get merch Get the Guy-gax mug. Buy Now — $32.95 See more merch