When you can tell when a woman is wearing a bra or not, there is the definite underlining of the boob which the shirt may catch under.
Jayk: Hey Ramsey
Ramsey:Yeah
Jayk:Lisa isnt wearing a bra today
Ramsey: how do you know
Jayk: you dont see that shirt saggage?
by Dirty Wizzard September 30, 2011
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