The rimshot comes from live comedy drumming in vaudeville and burlesque, where a drummer followed a comedian's punchline with two rim hits and a cymbal crash. The pattern became known as ba dum tss and moved into radio, television sitcoms and cartoon shorts as an instant signal that a joke had landed. Online, the clean isolated version spread through soundboards and video editors because it needs no setup and reads clearly even on phone speakers. Creators still use it today to mark intentional corniness rather than genuine triumph.