nip tits 

The temperature in which you are fucking freezing...and at times the nipples tend to hurt and expand....often times visible through the T-Shirt.

Damnnn....it is NIP TITS outside!

nip tits by aPiZzLe October 30, 2007

niptits 

Noun: The act of having nipples that encompass the entire surface area of your tits.

Kevin: Bro, I was hooking up with some chick last night and I took off her bra and she had niptits!

Sam: Sucks bro

niptits by Niptits lover June 24, 2011