/ Dictionary / Index J jelly roll: Meaning and Definition of Find definitions for: jel'ly roll" Pronunciation: [key] a thin, rectangular layer of sponge cake, spread with fruit jelly and rolled up. . the vagina. sexual intercourse. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: jellyroll (Thesaurus) jelly fungus jelutong Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language