Humungo Share definition Flag Something that is exteremly large, and in most cases breath taking. Derived from the word humungous but has been shortened to save time. That was a humungo rat that just crawld off the train. Humungo by Humungo Samone September 13, 2007 0 0 Get merch Get the Humungo mug. Buy Now — $32.95 See more merch