oops

oops /ʊps/ BrE AmE interjection
[Date: 1900-2000; Origin: Natural sound]
said when someone falls or makes a small mistake:
Oops, I’ve spelt that wrong.

Oxford Advanced Learner's Dictionary

oops

oops 7 [ʊps] [ʊps] [uːps] [uːps] exclamation
1. used when sb has almost had an accident, broken sth, etc.

• Oops! I almost spilled the wine.

2. used when you have done sth embarrassing, said sth rude by accident, told a secret, etc.
• Oops, I shouldn't have said that.
Word Origin:

[oops] natural exclamation: first recorded in English in the 1930s.

Cambridge Advanced Learner's Dictionary

oops

oops /uːps/ /ʊps/
exclamation (ALSO whoops) INFORMAL
an expression of surprise or regret about a mistake or slight accident:
Oops! I've typed two L's by mistake.

whoops

whoops /wʊps/
exclamation (ALSO oops) INFORMAL
an expression of surprise or regret about a mistake or slight accident:
Whoops! That's the second time I've spilt coffee today!

Collins COBUILD Advanced Learner’s English Dictionary

oops

['ʊps, u͟ːps]
EXCLAM (feelings)
You say `oops' to indicate that there has been a slight accident or mistake, or to apologize to someone for it. [INFORMAL]
Today they're saying, `Oops, we made a mistake.'
Syn:
whoops

oops

exclamation