/ Dictionary / Index B bumper jack: Meaning and Definition of Find definitions for: bump'er jack" Pronunciation: [key] a jack for lifting a motor vehicle by the bumper. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bumper guard bumper pool Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language