/ Dictionary / Index J jumped-up: Meaning and Definition of Find definitions for: jumped-up Pronunciation: ( jumpt'up'), [key] — adj. Chiefly Brit. having recently gained prominence or fame and appearing arrogant. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: jumped-up (Thesaurus) jump discontinuity jumper Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language