baw sack Share definition Flag A Scottish word for the cylindrical cupping of wrinkly skin, that houses the male sex seeds. Often referred to as the Testicles, or scrotum. Come on my son! Strap on a "baw sack" and ask that girl on a date! baw sack by Jimmy! August 17, 2006 0 0 Get merch Get the baw sack mug. Buy Now — $32.95 See more merch