Quadruple Boob Syndrome (QBS) is a very common disorder among preteens and adolescence. It's when girls don't really know their bra size so they end up buying a super bad, super TIGHT bra that cuts their boobs in half horizontally. Then to make things worse they wear a skin tight shirt that clearly shows this. There are many cures for this disease. The most common is buying a bra your size.
Sarah: Omg Jane, did you see Michelle today?
Jane: YESS !! Look at her chest, her shirt is so tight you can tell she has quadruple boob syndrome.