nipping out 

When your nipples can be seen poking through clothing, often because of cold weather, sexual arousal, or particular types of clothing. Many women wearing bathing suits and sports bras tend to have a problem with this because of thin coverage, feeling uncomfortable at the prominent exposure of their body.

Are you cold? You're nipping out.

nipping out by Charmen February 6, 2010

Nipping

Drinking, getting tipsy

Julie, Mom’s been nipping again. You’re going to have to drive her home.

Nipping by RoscoeJack December 8, 2019

Free Nipping 

Going braless

I got backless dress, looks like I'm going free nipping.

Free Nipping by JessO14 March 21, 2016

double nipping 

Sorry ladies, double nipping is limited to women with tits large enough to get the nipples close enough together to suck on both of them at the same time.

She loves double nipping, especially while she is riding on top.

double nipping by 2B+ October 25, 2016

nipping around 

Messing around, usually done with coolguys.

What The FUCK are you doing?
Just nipping around.

nipping around by carson and hayden March 15, 2008

Nipping

The act of stealing a cat's cat nip, or weed, for the express purpose to use it for ones own wishes, or simply because ones own stash has been depleated.

"Stop nipping from the cat and go buy your own!"

Nipping by Rojak September 3, 2011

nipplin 

as in being very cold out,freezing

God its nipplin out here i need some warmer clothes

nipplin by Josh Mosier January 16, 2008