Probably the armed forces, with the famous Garrison Hat worn by officers, and special types of occupation headgear in service jobs-including the (Flat top) worn mainly by Railroad and subway conductors in the US-But by Police and Army Men in France. Well it referred ro somebody holding two unrelated jobs or rank functions at once- a very real life example is the Pope also holding the title of Bishop of Rome! You can only wear wso many hats at once before they start falling off. so that”s the story