Galoomba Share definition Flag A short, round individual who is clearly a bitchass, and who wants nothing more than to spoil your day with incessant bitchassery. Guy 1: Maaann, look at this galoomba *bites into salad* Galoomba by professorbigboiboof May 24, 2019 0 0 Get merch Get the Galoomba mug. Buy Now — $32.95 See more merch