Top Definition
Mittens for your nipples.
It was so cold out that if Janie forgot to wear her nippens her nipples would have been able to cut glass.
by Free the Nippens January 10, 2009
the tip of the nipple
"did they just say nippen?"
"whats a nippen?"
"Its the tip of your nipple"
by meeshell September 18, 2006

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