A form of titty hard on in which only one nipple is hard.

Etymology: evolved from the popular image of a pirate with one eye covered by a patch
When walking down the street and noticing a girl with pirate nipple:

"YARRRRR! Shiver me timbers! Thar be pirate nipple in these waters!"
by yurple April 30, 2006
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An assassin in the order of "the Cuts", run by the First Cut. Nipple Pirates, or the less vulgar term, Chest Pirate, is used to describe a person who kills a person and then takes their nipples to put in his chest.
Example 1: Brett was totally being a Nipple Pirate today, he cut off these guys nipples and put it on his butt.
by Galevekon November 18, 2013
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