Oops!
American SlangDefinition
An exclamation used to acknowledge a minor mistake, accident, or slip-up, often conveying brief surprise or a light apology.
Examples
"Oops! I sent that email to the wrong person; I’ll forward the right one now."
"Oops! I bumped your chair—I didn’t see you there."
"I spilled a little coffee on the counter—oops! I’ll wipe it up."