Narc
来自Big Physics
wiktionary
Clipping of narcotics (control) officer.
Alternative spelling of nark, influenced by narc(“narcotics officer”).
Clipping of narcosis.
Clipping of narcissist.
etymonline
narc (n.)
1967 (earlier narco, 1960), American English slang, shortened form of narcotics agent. It had been used 1955 for narcotics hospital, 1958 for narcotics addict. The senses and spelling have tended to merge with older but unrelated nark (q.v.).
