"Ops!"
It's a short, informal exclamation used to express a mistake, surprise, or a small accident.
Here are some other ways to say "oops" in Portuguese, depending on the context:
* "Ai, que pena!" (Oh, what a pity!)
* "Que pena!" (What a pity!)
* "Desculpe!" (Excuse me!)
* "Perdão!" (Pardon me!)
* "Meu Deus!" (My God!)
* "Oh, não!" (Oh, no!)
The choice of expression will depend on the situation and the level of formality.