Boob Chub Share definition Flag when excess boobage leaks out of a supportive top such as a bathing suit or bra. that bathing suit is way too small for her! she has major boob chub!girl, readjust! check your boob chub! Boob Chub by moliv May 1, 2010 0 0 Get merch Get the Boob Chub mug. Buy Now — $32.95 See more merch