Top Definition
1. A nipple that is so sweaty and dirty that it looks greasy, like a pizza delivery boy's face. The grease resembles that of coagulated bacon grease, and in fact, could be used to fry some chicken.

2. An affectionate term referring to someone who is nasty dirty greasy.

After his shift at What-A-Burger flipping burgers, Reed was one big greasy nipple.
by Homely Loser July 20, 2007
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