Blah blah blah is a long-running English filler phrase used to stand in for dull, repetitive or unimportant speech, and that everyday familiarity is what gives this clip its instant comic effect. Online, short voice clips like this one circulate as meme sounds because they can be reused without any context: listeners recognise the attitude in the first second, even if they have never heard this exact recording before. It remains popular in short-form edits because it compresses a whole reaction, boredom, dismissal and impatience, into a few seconds.