Pony Pisser Share definition Flag The act or art of bull shitting someone. Lying to someone for your own personal gratification. Did you hear Jim braggin' about his latest exploits, he's such a Pony Pisser. Pony Pisser by sitlab December 8, 2009 0 0 Get merch Get the Pony Pisser mug. Buy Now — $32.95 See more merch