Put it at the end of a short fail sequence, after the mistake is clear, then follow it with the Awkward Moment sound for the reaction shot. For an anime-style build-up, open with the Anime Ahh sound before the blunder so the exclamation closes the joke.
About this sound
A seven-second voice clip centred on Nobita, built around a single sharp Italian exclamation that lands like a frustrated outburst. It feels abrupt, cheeky and deliberately over-the-top, the kind of reaction that turns a small annoyance into a joke. The sudden delivery makes it easy to recognise even without context.