/ Dictionary / Index G good egg: Meaning and Definition of Find definitions for: good' egg' Pronunciation: [key] — Informal. Informal. a person who is pleasant, agreeable, or trustworthy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. good day good evening Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language