chubber Share definition Flag 1.One who displays childish qualities and/or misbehaves in a childish fashion. 2. A half erect penis see also half-chub Megan is being such a chubber. i wish she would grow up sometimes. chubber by the mecca November 3, 2006 0 0 Get merch Get the chubber mug. Buy Now — $32.95 See more merch