whoopsie-daisy exclamation 1noun 1forms 1 exclamation1 •(informal) Used to acknowledge a mistake. noun1 •An accident or a mistake.“Baron, stop! It was just a mix-em-up!” “A whoopsie-daisy!” [Nandor yells] “Stay out of this!” [both yelling] — 2023 formswhoopsie-daisies
