babybrawn Share definition Flag Adjective. Describes the physical composition of a body, typically male. Specifically, a muscular physique covered with a layer of baby-fat. Man, that James used to be fit, but now he is just babybrawn. babybrawn by _K- February 28, 2009 0 0 Get merch Get the babybrawn mug. Buy Now — $32.95 See more merch