/ Dictionary / Index T tub-thumper: Meaning and Definition of Find definitions for: tub-thump•er Pronunciation: (tub'thum"pur), [key] — n. a vociferous supporter or promoter, as of a cause. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tub-thumper (Thesaurus) tuboid tubular Related Content Daily Word Quiz: pristine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language