twiddle n. + Add to list US //ˈtwɪdəɫ// UK //twˈɪdəl// twid·dle SynonymsEtymology Synonyms swirltwirlwhirlOrigin Unknown. Perhaps a blend of twirl, twist, or twitch; fiddle. Idioms1 entry01twiddle one's thumbsTo wait or dawdle; to accomplish nothing useful or lack a useful occupation.