chubber Share definition Flag The state of a penis between flacid and erect stages. Slightly engorged, fat penis but not hard. She underbuttoned her shirt, popped her voluptuous tits out of the bra, and I had an instant chubber. chubber by Chub B. Boy June 11, 2006 0 0 Get merch Get the chubber mug. Buy Now — $32.95 See more merch