An enlarged puffy aerola on a woman's breast with a disporportinately large nipple. The end result looks like the top of a pumpkin.
"Last night, I was with this chick. I took off her bra, and staring me in the face were the biggest pair of Pumpkin Nipples I have ever seen!"

"This shirt is chafing so much, it's giving me a Pumpkin Nipple."
by TheUnhipster December 5, 2009
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