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tommy gun

Syllabification: (tom·my gun)
Pronunciation: /ˈtämē/

Definition of tommy gun

noun

informal
  • a type of submachine gun.

Origin:

1920s: contraction of Thompson gun, named by its designer after John T. Thompson (1860–1940), the US army officer who conceived the idea for it

tommy gun in other Oxford dictionaries

Definition of tommy gun in the British & World English dictionary