Cocoa Pebbles Share definition Flag When your poop doesn't form correctly and it comes out in a pile of little brown balls. Someone dumped a lot of Cocoa Pebbles in the toilet. I wouldn't recommend eating them though. Cocoa Pebbles by Scritton Bow April 6, 2011 0 0 Get merch Get the Cocoa Pebbles mug. Buy Now — $32.95 See more merch