/ Dictionary / Index T Tommy gun: Meaning and Definition of Find definitions for: Tom'my gun" Pronunciation: [key] See Thompson submachine gun. any submachine gun. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tommycod tommyrot Related Content Daily Word Quiz: candor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language