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1967 (earlier narco, 1960), American English slang, shortened form of narcotics agent. Had been used 1955 for narcotics hospital, 1958 for narcotics addict. Sense and spelling tending to merge with older but unrelated nark (q.v.).
: down to the narco police on the beatnoun
A narcotics agent or police officer; gazer: another drug-scare hoax promulgated by the ''narcs''/ the ritual of dodging the ''narcos'' (1960s+ Narcotics)