EXPLODE-A-POOP Share definition Flag Occurs when you make it to the bathroom, and sit just in time. Bad case of diarrhea that explodes. Jim had a bad case of explode-a-poop after lunch today. EXPLODE-A-POOP by LBPGH April 7, 2008 0 0 Get merch Get the EXPLODE-A-POOP mug. Buy Now — $32.95 See more merch