/ Dictionary / Index M mopper-up: Meaning and Definition of Find definitions for: mop•per-up Pronunciation: (mop'ur-up'), [key] — pl. mop•pers-up. a person or thing that mops up. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mopish moppet Related Content Daily Word Quiz: digression Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language