kneeboobs Share definition Flag A women with very saggy boobs. As if they are approaching the knees. Sick! That girl has kneeboobs! Or if that's your type. Awsome, that chicks got kneeboobs! kneeboobs by foomanlinux September 1, 2008 0 0 Get merch Get the kneeboobs mug. Buy Now — $32.95 See more merch