Burp sounds have been a staple of prank and comedy soundboards for years because they are instantly recognisable, easy to understand without context, and reliably get a laugh from younger audiences. A chain version works especially well online, where creators use long, escalating noises to stretch a joke past the point of expectation in short videos, streams and reaction clips. It fits the same gross-out humour tradition as other bodily sound effects, and it remains popular because it needs no setup, translation or explanation to land.