This sound is known online as a short Karubi voice clip built around the phrase “urusai naa,” a common Japanese expression for complaining that something is too loud or noisy. It circulates mainly in meme edits, gaming compilations, and short reaction posts where a fast spoken line is funnier than a long rant. Its appeal comes from the compact timing and the familiar annoyed tone, which makes it easy to drop onto sudden yelling, cluttered audio, or over-the-top reactions without needing extra setup.