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Words and Their Stories: Nicknames for Chicago .
A nickname is a shortened version of a person's name. A nickname also can describe a person, place or thing. Many American cities have interesting nicknames.
In nineteen sixteen, the city gained two more nicknames from a poem called “Chicago,” written by Carl Sandburg. Here is the first part of the poem:Hog Butcher for the World,Tool Maker, Stacker of Wheat,Player with Railroads and the Nation’s Freight Handler;Stormy, husky, brawling,City of the Big Shoulders.
Chicago was called Hog Butcher for the World because of its huge meat-processing industry. And, it was called The City of the Big Shoulders or City of Broad Shoulders because of its importance to the nation.
There are several songs about Chicago. “My Kind of Town” was made popular by Frank Sinatra in nineteen sixty-four.

http://www.voanews.com/specialenglish/2010-01-08-voa1.cfm

impression
Because a town or a person used the nickname in U.S.A.
I felt it to be interesting, but was worried how I did it if there was the same name.