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1.
when you have either had severe boob reduction to the point where your tittys sag or if youre just an old geezer who lost their boob fat and have saggy tits that look like the male sac.
omg bobby your grandma has major tit sacs!!!!!!!

or

yolanda you had a boob reduction....damn now you got some tit sacs byotchhh!
by simba barcelona July 24, 2009