showcase shirt

A low-cut top worn by a woman, in order to expose her cleavage and/or breasts, much like putting them in a showcase. Typically, women who wear these tops deny that they want attention - they feign modesty, take extreme offense to catching men looking at their chest, and they frequently complain to other women about being objectified, due to their appearance, in a way that closely mimics humble-bragging.

Christina acts like it bothers her to have men look at her cleavage when talking to her, even though she only wears showcase shirts and tight jeans, around men.