dropopolis Share definition Flag A poop so large it forms a pile that extends above the water level in the toilet. Dude, I just had a dropopolis in your toilet! Either your john needs more water, or I need to cut back on the fiber! dropopolis by poobicus August 19, 2010 0 0 Get merch Get the dropopolis mug. Buy Now — $32.95 See more merch