When a nipple, usually during puberty, becomes hard like a nut under the skin; a common misconception is mistaking hard nipples due to cold weather or arousal for the nipple nut, however there's a fine line between them.
by The Dung Beetle May 4, 2009
Get the Nipple Nut mug.A term used by older men who were seemingly in the military at one point in their lives and now employ the term in degrading high school athletes. Being a combonation of the simple terms nipple and nuts, it's effectiveness is increased tenfold.
If you don't finish this lap in under ten seconds nipple nuts, i will run your weak body into the ground!
by GK18 March 31, 2007
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