First Known Use: 1920
Dictionary
Thompson submachine gun
noun Thomp·son submachine gun \ˈtäm(p)-sən-\
Definition of THOMPSON SUBMACHINE GUN
: a .45 caliber submachine gun with a drum or stick magazine, a pistol grip, and a detachable buttstock
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Origin of THOMPSON SUBMACHINE GUN
John T. Thompson †1940 American army officer
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