/ Dictionary / Index G goop: Meaning and Definition of Find definitions for: goop Pronunciation: (gp), [key] — n. Informal. a bad-mannered or inconsiderate person; clod; boor. goop Pronunciation: (gp), [key] — n. Slang. a viscous or sticky substance; goo. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: goop (Thesaurus) goony goopy Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language