The exact origin of this particular 'blablabla' clip is unclear, but the phrase itself has long been used in many languages to represent meaningless or excessive talking. Online, creators use short 'bla bla bla' sounds as reaction audio in memes, vertical videos, and messaging edits to dismiss rambling quickly. Its staying power comes from how universal the joke is: viewers instantly understand that the speaker is being tuned out. It fills a similar reaction role to sounds like bruh or a buzzer, but with a more talk-focused punchline.