/ Dictionary / Index F foot-in-mouth disease: Meaning and Definition of Find definitions for: foot'-in-mouth' disease" Pronunciation: [key] — Informal (facetious) Informal (facetious). the habit of making inappropriate, insensitive, or imprudent statements. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. foot-in-mouth foot-lambert Related Content Daily Word Quiz: longevity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language