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2.
the plunging neckline of a dress worn by a flat-chested or small-breasted woman; cleavage without the cleave
"Check out the décolletage on the chick who just walked in."
"What's the point? She's flat as a board."
by Maryland, USA February 05, 2010
 
1.
The Low cut neckline of a dress.
Lil kim is known for her decolletage sometimes she even forgos low cuts nd jus leaves a breast hanging out
by sariza April 28, 2008