Deepwater Horizon Poo Share definition Flag Oily, fatty floating diarrhea. Like an oil slick. OMG I just had the biggest deepwater horizon poo EVER! Deepwater Horizon Poo by poopyhead1987 December 27, 2011 0 0 Get merch Get the Deepwater Horizon Poo mug. Buy Now — $32.95 See more merch