Seikin is a Japanese YouTuber whose music and comedy videos have made him a familiar voice in Japanese online culture, and this oshiri clip comes from that playful, creator-led world rather than a film or television show. Fans have shared it as a short meme sound because the word itself is funny, easy to recognise and easy to drop into edits without needing translation. It remains in use for lighthearted, cheeky humour, especially in short-form videos where a single silly word can carry an entire joke.