Longman Dictionary English From Longman Dictionary of Contemporary Englishdiddlydid‧dly /ˈdɪdli/ (also diddlysquat /ˌdɪdliˈskwɒt $ ˈdɪdliskwɑːt/) American English informal noun → not know/mean diddlyOrigin diddly (1900-2000) Probably from doodlysquat “nothing” ((1900-2000)) ldoceonline.com
