When you have the urgency to go number 2 and it feels like a monster is about to unleash out of your butthole but when you sit down on the toilet, only a pebble of poop comes out and nothing else. No matter how hard you push, that pebble will be the only thing in that toilet. Thus, resulting in a 'Harry Hu-Poopy'.
by Turdsinkerman October 4, 2011