A collection of chest hairs concentrated above a male's nipples.
That dude's nipple brow looked like his chest was eye-fucking me.
by sundeviljoel September 26, 2009
An unsightly mass of hair above one's nipple. Is usually not accompanied by chest hair; rather, it stands alone, without the company of friendly follicles. These are gross and should be shaved or pruned accordingly to one's personal taste. Such formations may be present on men, women, or felines.
Jon has a nipplebrow over his nipple.
by Saunsdayn Mbcelrabuegrhilcihnn July 27, 2009