The term COP OP is a combination of two job titles. COP stands for Constable on Patrol, which is a police officer who patrols the streets and responds to calls for service. OP stands for Operational Police, which is a police officer who works in an operational capacity, such as conducting investigations or responding to major incidents. Together, these two job titles form the term COP OP, which is used to refer to a police officer who works in both patrol and operational roles.