Abnormally Bulbous Nipples. A genetic syndrome that can often affect people who are under alot of stress as well. One telltale sign of this obscure occurance is when nipple-lumps can still be seen, despite the wearing of a bra.
ABN makes little more than curious embarassment for most people, but it's a gift from the gods for fashion models.
"Asshole By Nature", Dub-G, Jay-Ton, Boss and Others
You hear that new Asshole joint? Hell yeah bitch, fucking im a ABN.