Boob Goob Share definition Flag The accumulation of sweat and dead skin under the boobs, particularly of large breasted women (and some men). "Gina had to go in and shower to get rid of her boob goob after being outside all day." Boob Goob by SlurzGirl July 18, 2015 0 0 Get merch Get the Boob Goob mug. Buy Now — $32.95 See more merch