/ Dictionary / Index S slop jar: Meaning and Definition of Find definitions for: slop' jar" Pronunciation: [key] a large jar or pail for collecting household slop for disposal. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sloper slop-over Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language