Vagiack Share definition Flag the giant fire-breathing, baby spitting back vagina that follows (4) of god in a machine around, giving him ideas. Run! it's the vagiack!That girls is so nasty she has a vagiack. Vagiack by The_instigator23 January 12, 2011 0 0 Get merch Get the Vagiack mug. Buy Now — $32.95 See more merch