Gratesgeropunun Share definition Flag A nun with no life other than grating the asses of horses and then licking their insides. OMFG! Its a gratesgeropunun screwing with that horse! Gratesgeropunun by Cheese Boy September 13, 2003 0 0 Get merch Get the Gratesgeropunun mug. Buy Now — $32.95 See more merch