Colossagoyle Share definition Flag A term used to describe the most unbeatable and destructive kinds of monsters, enemies, and fiends. Guy1: Hey, did you beat the last boss of that game yet? Guy2: Nah, the last boss is a colossagoyle. Colossagoyle by Doop Min' November 21, 2009 0 0 Get merch Get the Colossagoyle mug. Buy Now — $32.95 See more merch