poocrumb Share definition Flag a poocrumb is where one has a poo and there is remanence of poo left on the hair around the anus. Can also be used as an insult. Gary wiped his arse and there was poocrumb left on there! or You poocrumb! poocrumb by Jack Pemberton November 18, 2007 0 0 Get merch Get the poocrumb mug. Buy Now — $32.95 See more merch