fiddlesticks /ˈfɪdl̩.stɪks/ exclamation2 •(euphemistic) Nonsense! Expresses dismissal or disdain.Fiddlesticks! It's nothing but smoke and mirrors! •(euphemistic) Darn! Expresses mild dismay or annoyance.Oh, fiddlesticks! I locked my keys in the car.