The rimshot, often written as ba-dum-tss, has long been the drummer's shorthand for a joke landing in stand-up comedy and variety shows. Bass-boosted versions became popular online as meme editors pushed the low end harder for short videos, where a louder hit reads better on phone speakers. It sits alongside other short musical stings, like a dramatic sting, that creators use to signal a joke or a reveal. Its staying power comes from instant recognition: even without words, listeners know a punchline has just happened.