Meaning of diddly in English:

diddly

(also diddley)

adjective

informal
  • Insignificant, trifling.

noun

informal
  • Diddly-squat.

Origin

Late 19th century; earliest use found in The Newark Advocate. Origin uncertain. Perhaps compare diddle or diddle, or perhaps an alteration of tiddly.

Pronunciation

diddly

/ˈdɪdlɪ/ /ˈdɪd(ə)lɪ/