The term 'Drug Cop' is a colloquialism for a law enforcement officer who specializes in the investigation and enforcement of drug-related crimes. The two crossword solutions for this term are 'NARC' (4 letters) and 'NARCO' (5 letters). NARC is an acronym for Narcotics Officer, while NARCO is an abbreviation for Narcotics Agent. Both terms refer to the same type of law enforcement officer, who is responsible for investigating and apprehending individuals involved in illegal drug activities.