Merp circulates online as a short, anonymous meme reaction rather than a clip tied to one famous scene, which has helped it travel easily between edits, streams and short-form videos. Its appeal is its vagueness: it can read as boredom, confusion, defeat or gentle mockery depending on the face or caption paired with it. Because it is under a second long, creators reuse it as a quick punchline alongside other short reaction clips like bruh and goofy ahh sounds, and it keeps working precisely because it never tries to explain the joke.