narc(redirected from narc on)
narc 1(närk) Slang
A law enforcement officer, usually one working undercover, who deals with narcotics violations.
[Short for narcotics agent.]
narc 2(närk) Slang
An informer; a snitch.
intr.v. narced, narc·ing, narcsPhrasal Verb:
To act as an informer; snitch.
To give an authority information about a crime or infraction committed by (someone); inform on: He was caught dealing drugs because his roommate narced on him.
slang US a narcotics agent
a government narcotics agent or detective.
[1965–70, Amer.; shortening of narcotic]