Jewelpet is a long-running Japanese anime and toy franchise centred on magical animal characters, and its bright, exaggerated sound design lends itself well to short clips shared online. This slap, lasting only a fraction of a second, has circulated on soundboards as a handy reaction effect rather than as a famous line or scene, which is why creators tend to use it for timing rather than for a reference viewers are expected to recognise. Its popularity comes from that flexibility: it fits anime edits, meme compilations and short-form videos without needing any knowledge of the original show.