The rimshot comes from live comedy and vaudeville drumming, where a drummer would accent a comedian's joke with a quick snare and cymbal figure known as ba-dum-tss. The pattern became a shorthand for a punchline in radio, television and stand-up, and later spread through internet videos, memes and soundboards, where a two-second clip can instantly signal a joke. It remains popular because it needs no explanation: listeners recognise the rhythm at once and know whether to laugh or groan.