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

8 Words Related to Nin NIn

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

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