/ ˈʊpsi deɪzi; NAmE ; ˈʌpsi/ (also ups-a-daisy , oops-a-daisy /ˈʊpsə deɪzi; ˈʌpsə/) exclamation
said when you have made a mistake, dropped sth, fallen down, etc. or when sb else has
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WORD ORIGIN
mid 19th cent.: alteration of earlier up-a-daisy ; compare with lackadaisical .