The exact origin of this clip is undocumented, so it is best described by how it circulates online. Short 'blah blah blah' voice clips like this one live on user-made soundboards, where they are filed alongside other dismissive one-liners and reaction sounds. Creators grab them to puncture long speeches in memes, gaming commentary and short-form edits, because the phrase is universally understood as shorthand for 'I stopped listening.' Its staying power comes from that simplicity: three seconds of gibberish that needs no translation and works in almost any language context.