Living Off The Boob Share definition Flag I. Behaving like an infant. II. Immature,Childish. III. Still living in your mother's house. That Keith guy, he needs to quit living off the boob,and grow up. Living Off The Boob by Corpse-Darkfall February 22, 2009 0 0 Get merch Get the Living Off The Boob mug. Buy Now — $32.95 See more merch