Bla bla has long been used in everyday speech as shorthand for dull, repetitive or meaningless talk, and short clips built around the phrase circulate widely as reaction sounds on social platforms and soundboards. Creators reuse the same brief repetition because it needs no explanation and translates easily across languages and contexts. Its staying power comes from that simplicity: anyone who has endured a tedious explanation recognises the feeling immediately, so the clip keeps appearing in memes, edits and comedy sketches about people talking too much.