Top Definition
A type of zipper seen on a jacket (particularly fleece jackets) positioned directly over the nipples. Nipple zippers are most recognized when in pairs. When the zipper is pointing up the nipple zippers are considered to be perky.
We could tell that Jae was in a good mood on Monday because his nipple zippers were looking quite perky.
by Andy "Pants" Jones March 07, 2008

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