1. A Narcotics officer.

2. A tattle-tale, someone who would tell parents/boss/police/authority figure/the man about a misdeed.

3. Someone who hates care-free fun, usually a similar type of person to 2. Will often rain on your parade with facts about the environment when you get a new car. Will complain about practical jokes being mean, or play devil's advocate when it is unecessary or nearly impossible.

4. A person who is short tempered or irratable. Will often shout at you for being on their lawn.
I think that guy might be a Narc, you should hide your stash.

God, Phil, you're such a narc. I can't believe you told the teacher I threw the paper.

Stop being such a fucking narc, Sim. You can't outrun a bear and child abuse IS wrong.

Calm down, you've turned into such a narc lately.
by The Nerd King February 19, 2008

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a tattle tale, a killjoy
John told the teacher I cheated, what a narc!
by Alishizzle December 21, 2006

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narc is short for narcotics officer. It is used to refer to someone who tells a figure of authority about drug use.

To narc is the action of telling an authority figure about drug use.
Johnny fuckin narced on me and the cops took all my herb.

Muthafuckin narc!
by Fatass December 23, 2004

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The crevasse in which your butt hair turns into your thigh hair.
Guy#1: Man, my N.A.R.C. is soooo sweaty!
Guy#2: Are you serious? After my N.A.R.C. piercing, mines infected.
by MVZ689 June 06, 2009

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a name for someone whose a snitch.
yo ryan told on connor again for looking at porn. what a narc.
by l-nice July 01, 2006

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1. Someone who rats another out, usually regarding illegal activity.

2. A person who sleeps alot. Thus they are jokingly called "narc", short for narcoleptic: a person with the disease of narcolepsy, who as a result does not have proper control over sleeping/wakefulness.
A: "Yo, B!"
B: "zzzzzzZZZZZzzzz"
A: "...B's a fucking narc."
C: "true."
by Leilani_h June 04, 2005

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a narc is someone who tells on someone else for a wrong doing
Someone motherfucker narcked on my ass, dammit.
by CnN June 11, 2003

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