sentences:  "Nicky" was short for nickel plate, a sobriquet bestowed in the 1890s when, as a boy, Arnstein rode a gleaming nickel-plated bicycle in the then-popular bike racing craze.However, he spent more time throwing races than winning them.He graduated to gambling on transatlantic liners and in European casinos, and eventually fell in with Arnold Rothstein, a loan shark, bookmaker, fence, Wall Street swindler, real estate speculator, and labor racketeer, who was best known for fixing the 1919 World Series.