when a person is of such an obese size that not only do they have one pair of breasts (even if theyre a man), they also have ANOTHER pair of breasts underneath the first pair, hence having four breasts.
A term used to describe girls, usually big breasted women who are wearing a bra that is too small for them so it looks like they have four boobs.
I bought a bra the other day and thought it would be good to wear to the club, but i started dancing and noticed I had quadraboob. My nipples were hangin out.
the two extra boobs that show when said lady wears a bra that's too small. may appear on the top or bottom of a boob. if both top and bottom rolls are displayed it is referred to as a hexaboobagon
"look at her tight shirt. I wonder if she knows she has quadraboobaroll? She needs to gotuck them in!"