Topping The Sundae Share definition Flag The (possibly sexual) act of vomiting on a partner's genitals. Usually an accident, and always played off as one. I tried tossing the salad, but I ended up topping the sundae. Topping The Sundae by Bud Mutt March 30, 2013 0 0 Get merch Get the Topping The Sundae mug. Buy Now — $32.95 See more merch