tommy gun

noun
🔊/ˈtɒmi ɡʌn/
🔊/ˈtɑːmi ɡʌn/
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  1. a type of sub-machine gun汤普森冲锋枪
    Word Origin1920s: contraction of Thompson gun, named by its designer after John T. Thompson (1860–1940), the American army officer who conceived the idea for it.