Gap Gravy Share definition Flag The vaginal secretion often found in nasty hookers. Usually green or yellow and color, and often smells like the Seattle fish market Damn that girl had some wicked gap gravy, she should really douche. Gap Gravy by The Bearded Lady May 28, 2008 0 0 Get merch Get the Gap Gravy mug. Buy Now — $32.95 See more merch