Nin 

A. Adjective. Short for Ninja. Slang term for a friend. Derived from the word Nigga, Ninja is a more politically correct term to use but imply's the same thing. A T-Shirt highlighted in the movie Bench warmers stated "Strictly For My Ninjas" Playing on the words of the hit rap song "strictly 4 my niggaz" performed by 2 Pac. See also Ninja.

What up Nin, are you coming over tonight?

Nin by Brian Patterson May 16, 2007

nin 

A womans genitals. A vagina.

Tight as a nun's nin on Sunday.

nin by Ryan McKenna April 18, 2007

Nin 

The act of vandalizing a persons house for hours and hours using eggs, chalk, and placing forks pointy side up.

You wannna go nin St ninans house

Nin by Wombat3 January 16, 2017

nin 

Short form of "ni ni"(better known as "night night")
First heared in Gaming Communities, as they especially like to shorten almost every senrence..

"im going to sleep, good night everyone!~"
- "nin"

nin by Honeypenguin June 24, 2017

Nin 

A beautiful girl with lots of charm. Adventurous, curious, and loyal, she's the cutest thing around.

Person 1: Wow she is workin the crowd!
Person 2: She's a local celebrity ...can't walk down the street without getting attention.
Person 1: Wow, what a cutie, that Nin!

Nin by Ms. Nin August 27, 2017

Nin 

the most bestest bsf in the mf world. luvs memes, will annoy u to death, but will die for u.🤞🏽🤞🏽🤞🏽😍😍😂🥚💕🥶

“Hey Ninnnnnnnn!!!”
“Heyyyyy bestieee!!!!!!”

Nin by yonanny.84(70)$ March 30, 2019

Nin 

Can be used to describe actions which are grim and disgusting or annoying. Similar to modern day use of the word nonce so its definition is flexible in context

Thea chunned at the motive. That is ninny behaviour.
Becca is such a nin, shes always chatting shit

Nin by Freddofrog123 November 4, 2019