An exclamation used to express surprise, apology, or acknowledgment when someone makes a small mistake.
Likely imitative in origin, possibly from the sound of sudden realization, or an exclamation that evolved in early-to-mid 20th century English, gaining widespread use in casual speech.
The word 'oops' is so recent (probably 1900s) that linguists aren't even sure exactly where it came from, but it's become universal because it perfectly captures that moment of sudden realization—it's genuinely new slang that became a standard word within just decades.
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