The letters zzz have long been used in comics and cartoons as a visual shorthand for sleeping, and the spoken version turns that idea into sound. Online, creators adopted the short buzzing effect for memes, reaction videos, and short-form edits where a single second is enough to sell the joke. It works because almost everyone recognises it instantly, with no explanation needed. That instant recognition is why it keeps appearing in gaming clips, boredom jokes, and late-night edits, even as trends change around it.