Nuclear Poop Share definition Flag When you take a dump and the water from below splashes into your hole. Aww man... I had Nuclear Poop today, I didn't even have to use any toilet paper it was so cleansing. Nuclear Poop by Nathan Sch. June 25, 2007 0 0 Get merch Get the Nuclear Poop mug. Buy Now — $32.95 See more merch