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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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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a name for someone whose a snitch.
yo ryan told on connor again for looking at porn. what a narc.
by l-nice July 1, 2006
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Short abbreviation for "narcissist", which means conceited, self-obsessed, bigheaded.
...also a very good Interpol song
Johnny is such a Narc, all he thinks about is himself.
by Meeneh December 27, 2005
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an undercover pig who tries to bust ppl for using drugs
by ash October 28, 2003
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the (residence advisor) RA on the second floor of hemlesen, ubc
"bruh, she's the BIGGEST narc! she told us we couldn't throw the drop bikes on the roof!"
by dumbitch100 April 23, 2019
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