NIN 

The logo of Nine Inch Nails, with a reversed second 'N'. Short form slang popularized by parents and those who didn't realise the letters stood for something. 'Nails' is the appropriate short form.

"What is 'NIN?" asked his mother.

NIN by The Jayson July 19, 2009

Nin 

A hairy, mythical creature that lives in the forest of Delaware

Justin is a Nin. In fact, he is the original Nin.

Nin by Izcherry June 7, 2016

Nin 

Used to describe an amazing frog.

Woah! Look at that Nin!

Nin by Megarino Bobino October 29, 2018

Nin 

Nin, or short for Nino is another word for wiener and or the male genitalia oft referred to as the penis. This word was not only popularized but also brought into mainstream culture by Aamir and Uzair, who like E-40 revolutionized an entire culture.

Oz you are shaped like Harris K's nin, small and fat.

Woah is that the goalie, no thats just your nin?

Nin by Young Perv January 12, 2011

nin 

a replacement word that replaces anything in the whole freaking world that college kids just dont get.

dude im going on vacation to nin

nin by Ninner 4545 January 27, 2010

nin 

An abbreviation for "No its not"

Sheneiqua - "Yah it is, ho"
Lafonda - "Nin, bitch"

nin by #lucasworldproblems November 9, 2014

Nin 

a freakishly large dick that is usually very, very hairy and ugly.
or a person that acts very stupid and retarded.

This can range from saying something mean to just acting weird.

Josh: How was last night?
Emily: Totally great, he had a total nin.

or

Natalie: Wow! I didn't know trees were green!
Jaclyn: You are such a nin! Trees are always green!

Nin by friends4eve101 December 21, 2009