magasive Share definition Flag pronounced mag-ass-ive it is something something that is biger than massive and ginormous pu together but not quite as big as colossal guy: dude that was massiveguy2: NO way that was ginormous maybe even magasive magasive by themanbatspaghetti May 13, 2016 0 0 Get merch Get the magasive mug. Buy Now — $32.95 See more merch