Term used to describe a girl who is just plain NASTY but not in the "infested with diseases type" nasty... just viciously NASTY! Often, people have lovingly applied such letters as an initial for someone who is Nasty as in Nasty McNasty... or Nancy McNasty!
Daamnn... did you hear what that NMN just said?? That was just straight-up NASTY that I can't even reiterate what she just said!
by Refrigerator Bandit February 03, 2010
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No Middle Name. used on school report card to show that a person does not have a middle name. Used most commonly on Asian people.
ho, sam nmn

to, vimin nmn

xu, tom nmn
by Rick Chez January 13, 2007
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stands for: not my nigga
Stacy: Bryce is hot but he’s jenny’s

Jenny: that’s nmn
by lilloveydovey May 03, 2018
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the bestest group of bestest freinds they will rule supreme over the entertainment industry
-Who is the best rap group ever ?
-NMN
by The9thSlice April 08, 2021
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