Breadcrumb Home > Dictionary > Index M muttonhead: Meaning and Definition of Find definitions for: mut•ton•head Pronunciation: (mut'n-hed"), [key] — n. Informal. a slow-witted, foolish, or stupid person; dolt. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: muttonhead (Thesaurus) muttonfish mutton snapper ✖ Related Content Daily Word Quiz: quadrumanous Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language