v. To sneak; to attempt to move in a stealthy manner, usually poorly. From "ninja" and Flonne in Disgaea.
"I should not have to nin-nin-nin my goddamn cursor past a rollover popup just to read my mail."

"He nin-nin-nin-ed his way past me...right until he fell down the stairs."
by chibi_trillian April 4, 2005
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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 6, 2009
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Short term for Nine Inch Nails. It is a very popular rendition of Industrial music which is almost completely run by music god Trent Reznor.
"Dude, NIN is by far greater than that poser crap you listen to Eddy. What was it again? KoRn?"
by Bradley Nowell December 24, 2003
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abreviation for "nine inch nails", a totally awesome band.
have you downloaded that new NIN song yet?
by kalieigh July 18, 2005
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Trent Reznor (b. Michael Trent Reznor, 17 May,1965, Mercer, Pennsylvania, USA) is a multi- instrumentalist, vocalist, and the creative force behind "Nine Inch Nails." Reznor began the recording as NIN on 1988 in a local Cleveland Recording Studio. As the founder of NIN, he is also the only official member. NIN's music straddles a wide range of genres, it is mainly industrial and/or is usually retaining a characteristic sound using electronic instruments and processing. The Nine Inch Nails' logo, which consists of the letters NIИ was inspired by Tibor Kalman's typography on the Talking Heads album Remain in Light.
Top 5 greatest NIN songs (my opinion): 5. Gone, Still Still 4. La Mer Fragile 3. Leaving Hope Still 2. And All That Could Have Been Still 1. Adrift And At Peace Still
The brackets are for the album of the specific song.
by INFINITY1523 July 6, 2010
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Short form of Nine inch Nails, Influencial and prodigious musical group, almost always written in all caps.
I like to listen to NIN while i think about killing myself.
by illissus April 18, 2003
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A man/woman whose neck and chin are in such close proportions that there is no clearly defined beginning and/or end.
Look at that nin in the coner; she looks like a fat version of Beaker from the Muppets.
by unifoon December 8, 2012
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