This sound is associated with anime fandom and is commonly labeled around Oikawa, a well-known character from Haikyuu!!. Short Japanese voice clips like this spread through reposted edits, reaction videos and character compilations on TikTok, YouTube and soundboards. The appeal is simple: even without a full scene, the line instantly conveys teasing frustration and character chemistry. It remains popular because Haikyuu clips are still widely shared, and "baka" is one of the most recognizable Japanese words in online anime culture.