whoopsy daisy! (mostly UK) (other forms: oopsy daisy! upsidaisy! upsa-daisy! upsy-daisy! oops-a-daisy!)
interjection

- to express surprise or regret about a sudden mistake


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WORD ORIGIN

The expression "whoopsy daisy", which is seldom written and mostly spoken, is an old-fashioned way to signify mild surprise about a (usually) harmless accident or mistake.

For instance, accidentally dropping your pocket change on the floor while standing in a supermarket line is an occasion to say "whoopsy daisy!"

When a small child falls over, the expression would be used to keep the tone light, to help the child see she hasn’t really hurt herself, and to prevent her dissolving in tears, and often, to help get her back on her feet again.

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SYNONYMS

uh oh! my goodness! whoa! whoops! oops! -- blimey! (UK)  darn! shoot! (US)

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Practice OWAD in a conversation:

"WHOOPSY DAISY! I wanted to drink that cup of tea, not spill it over the desk."