fat cack Share definition Flag overyly wide, lump,vieny,chubby, chode like or gerthy weeiner holy shit! dat kid joey has got one fat cack! i would be sooo embarrased!!! fat cack by sha-kne-qwahhh April 7, 2007 0 0 Get merch Get the fat cack mug. Buy Now — $32.95 See more merch
