The term 'law enforcer' is a broad term that encompasses a variety of roles. Three common abbreviations for this job title are 'COP, ' 'POLICEMAN, ' and 'police officer.' A COP is a slang term for a police officer, who is responsible for enforcing laws and maintaining public order. A POLICEMAN is a more formal term for a police officer, and a police officer is a law enforcement official who is responsible for protecting citizens and preventing crime.