Top Definition
1. Breasts of a usually older and over-weight female which are saggy, long, flat and astoundingly repulsive.

2. Breasts that when not upholstered by a bra hang so low that they pose a serious trip hazard to the lady who they belong to.
"Is she a milf?" "No fucking way, she's got flat-waps and bingo wings!"
by Bigtoke September 07, 2009
9 Words related to flat-waps

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