The work of police officers in all countries of the world is absolutely the same, despite the different names of this position in each individual state. The first phrase "police officer" appeared in the distant 1859 - so how did it change after so many years?
Unofficial nicknames
In the United States, the most common name for cops is the word "cop", considered an abbreviation for "patrol cop" (Constable on Patrol). Also its origin is associated with the word copper ("copper") - the first American policemen wore eight-pointed stars made of copper. In Britain, cops are called "bobby" - a derivative on behalf of Robert Peale, the founder of the British police and the famous Scotland Yard. In Russia and Ukraine they are habitually called "cops."
Today, in many countries (including Britain), the usual names of policemen are gradually supplanted by the American word "cop".
In France, the most common nickname for police officers is the word "flick", which appeared in the mid-19th century. This nickname stands for "fly", but the witty French gave him another decoding - Federation Legale des Idiots Casques (Legal Federation of Idiots in Helmets). In addition to flickers, in France policemen are often called "ajahn" from the word "agent" or poule (chicken). In Germany, police officers are approached in absentia as Bulle (bull), in Spain - poli, and in Italy - “sbirro” (comes from the red color of the uniform).