Carbunkle Share definition Flag A spark plug sized turd similar to a dingleberry that hangs off of a dog's ass in the winter while piching a loaf in the freezing cold. It's freezing out. I hope Rover doesn't get a carbunkle after he takes his shit. Carbunkle by kidlou December 25, 2010 0 0 Get merch Get the Carbunkle mug. Buy Now — $32.95 See more merch