I may as well say at once that these three men were "narks."
Most deputies in lodging-houses were in the first place "narks."
A man cannot be a very long time on the road before he understands the meaning of the word "narks."
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 beat
A narcotics agent or police officer; gazer: another drug-scare hoax promulgated by the ''narcs''/ the ritual of dodging the ''narcos'' (1960s+ Narcotics)
(also narc): He will nark on him if the first guy doesn't keep playing games/ felt the Fraynes and their youngsters had narced on them
[fr Romany nak, ''nose'']