Australian cleavage
Boobpedia - Encyclopedia of big boobs

Australian cleavage is a term used to describe partial exposure of the "down under" side of the boob, such as below an extremely short crop top or when hidden by long hair ("hair bra"). Like conventional cleavage, the nipple is not exposed by Australian cleavage.
This form of breast exposure is also referred to as neathage.[1] This term may also be used to describe partial images of most of the boob, including the nipple, where the underside of the tit is emphasized.



