This clip belongs to the TikTok goodbye trend, a wave of short farewell sounds that creators reuse whenever a video needs a clear ending. Rather than coming from a single film or song, it spread because it is instantly readable: viewers recognise the goodbye cue without any explanation, so editors can drop it at the end of skits, reactions and compilations. Its popularity comes from that flexibility, working for sincere farewells, sarcastic exits and running jokes about someone finally leaving, alongside clips like bye bye mewing.