when your nipple is pointy and you rub it on circles.
avery: damn you have a hard nipple

sophia: that made me have a hard nipple
by Zenón June 11, 2020
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When you grow a pimple like bump inside your nipple or your nipple just becomes hard.
I've come down with a case of Hard Nipple-Tightis
by Matt January 24, 2004
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A determined female.

Determined males are hard-headed, hard-nosed, and have a hard-on over something.
Stop being hard-nippled about it, you can't get everything you want!
by SHvapor October 19, 2015
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