What's on your mug?

adj. Chilly; cold enough to make the nipples stand at attention.

Person 1: Hello, Ms. Anderson-Lee. It's a bit nippley out today, isn't it? Pam: Huh? It's 80 degrees...

By The Grammar Nazi

When it is so nippy (cold) that your nipples stick out - therefore making it a 'nippley' temperature.

"I turned the A/C in my car up to high! It's so nippley in here right now!"

By gilnokoibito

Nippley, use as in nippy when the weather changes to colder temperatures and women don't dress appropriately while outside and their nipples become erect in contact with the cold air. It's a way to tell your friends that there is a nipple alert.

Steve and a few of his friends were standing outside the bar when a group of young women passed shivering in the cold and having hard nipples. "It's a tad nippley out this evening isn't it?" asked Steve directing the attention of his friends to the ladies boobs as they passed.

By Sneakyteaky

the expression used when a female seems to be arroused and her nipples appear to be larger than usual...this may also be used when it is cold

coral, you appear to be very nippley since you saw me

By huggless

When it's cold out outside, and makes your nipples hard.

Guy 1 "Dude it's nippley out." Guy 2 "Don't you mean nippy?" Guy 1 "No, I mean nippley. As in it's nippy outside, but your nipps get hard."

By biscuit