/ Dictionary / Index G grease cup: Meaning and Definition of Find definitions for: grease' cup" Pronunciation: [key] oilcup. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. greaseball grease gun Related Content Daily Word Quiz: weary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language