Gabiljillion Share definition Flag A number so great and HUGE that N.A.S.A scientists cant even fathom this number. Omg, what a fag, they told him to shut the fuck up like a gabiljillion times and he is still talking, what a n00b. Gabiljillion by Doh Nuts 13 December 14, 2004 0 0 Get merch Get the Gabiljillion mug. Buy Now — $32.95 See more merch