interjection
oops; whoops; that's enough
Casual interjection used when one makes a small mistake or when indicating that a poured drink is sufficient. The second meaning is often accompanied by a hand gesture.
おっとっと、コップを倒しそうになった。
Oops, I almost knocked over the glass.
おっとっと、もうお酒は十分です。
That's enough, I've had plenty of alcohol.