Cleavage

File:Jessica-simpson-hollywood-cleavage-01.jpg

Jessica Simpson shows her cleavage

Cleavage literally means the gap between a woman's breasts. It is generally used to mean the sight of this gap, or of the breasts themselves, as revealed by a low-cut garment.

The term is also used to describe a glimpse of the top of the buttocks (of a man or woman) over low-cut trousers.