Breadcrumb Home > Dictionary Cite Meaning of diddly Find definitions for: did•dly Pronunciation: (did'lē), [key] — pl. -dlies a thing of little or no value; naught: Your excuses aren't worth diddly to me. a flaw; malfunction. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: diddly (Thesaurus) Diddley diddlyshit Related Content Daily Word Quiz: persiflage Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language