Refers the quality and/or location of a female breast augmentation. The higher on the chest & larger volume, the better the stance of her breasts. Those who do not prefer augmented breast must avoid using the the word when describing natural breasts.
Eric: have you seen the stance on Jenny's new tits?
Adam: no, I haven't. How are they?
Eric: her doc stretch & poked them perfectly.
Adam: I just saw her, she is stanced!