Breadcrumb Home > Dictionary > Index M Mutt and Jeff: Meaning and Definition of Find definitions for: Mutt' and Jeff' Pronunciation: [key] a very short and a very tall person who are paired as companions, teammates, or associates. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mutt mutter ✖ Related Content Daily Word Quiz: unctuous Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language