Brown Shirt (n.)youdaoicibaDictYouDict[Brown Shirt 词源字典]
generic term for "Nazi, fascist," especially of the thuggish sort, 1934, originally (1922) in reference to the German Sturmabteilung, Nazi militia founded 1921; they were called Brown Shirts in English because of their uniforms.[Brown Shirt etymology, Brown Shirt origin, 英语词源]