Grumpy Old Crummuggen Share definition Flag a hater of all things silly, young, funny, or cool Leonard glares at the frog in the pickle jar because he is a grumpy old crummuggen! Grumpy Old Crummuggen by watergirljamiet September 14, 2011 0 0 Get merch Get the Grumpy Old Crummuggen mug. Buy Now — $32.95 See more merch
