whoops

(hwo̵ops, wo̵ops; hwo̵̅o̅ps, wo̵̅o̅ps)

interjection

used to express sudden or surprised dismay, or, sometimes, implied apology, after one has blundered, tripped, broken something, misspoken, etc.

See whoops in American Heritage Dictionary 4

interjection
Used to express apology or mild surprise.

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