horsewallop Share definition Flag a word used in place of "horse shit" when you realize halfway through saying it that you are in the presence of virgin ears. That's a load of horse-... *sees children nearby* ...wallop! Horsewallop! horsewallop by NoMSG September 29, 2010 0 0 Get merch Get the horsewallop mug. Buy Now — $32.95 See more merch