Risada Cancer circulates mainly as a short meme laugh on Brazilian soundboards and in short-form video edits, where its raw, gasping delivery has made it a shorthand for laughter that feels excessive or unstoppable. Rather than belonging to a single famous scene, it is reused because it is instantly recognisable as a reaction: creators drop it over fails, awkward clips and ironic moments to signal that something is too funny to take seriously. Its simplicity and short length help it survive in memes, reaction videos and group-chat jokes.