Grogous Share definition Flag A grumbling belly or stomach. Potentially considered gross and off putting by some, but fascinating due to the variety of sounds it emits. Thomas: *grrrrrRRR* Rebecca: "Is that your grogous?" Thomas: "yeeeeeh. I think I'm hungry!". Grogous by Slimey_Vic October 16, 2013 0 0 Get merch Get the Grogous mug. Buy Now — $32.95 See more merch