Uruha Rushia was a Japanese virtual YouTuber with Hololive, known for a playful yet sharp on-stream personality that made short reaction moments easy to clip and share. This bruh sound comes from that fan-driven clipping culture, where a single deadpan word could be lifted from a stream and reused far beyond its original context. It spread through edits, memes, and soundboards as a quick response to an awkward moment, a bad decision, or something too silly to argue with, and it remains popular because the delivery is instantly recognisable even without any visual context.