Top Definition
A term signifying agreement. Nin Nin doesn't actually have a specific definition it's just used at random moments to break the silence, piss people off by chanting like the you belong to a cult of douches and just agreeing about things with other people.

Nin Nin is often believed to be a bastardized ninja.
Spermswamp's Fermented Anal Nectar has to be the fucking most original song.

Nin Nin.
by BAPHVOMIT September 06, 2009

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Gently licking breasts.
Her honey absolutely licks her ninnin gently and smoothly.
by Juperman79 December 10, 2013

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt