The sound comes from asking Amazon's Alexa voice assistant to do a quick fart, a novelty response that turned a helpful smart speaker into a prank device. Clips of Alexa making rude noises were shared online as a fart meme sound, because the joke needs no context beyond the request and the reply. Its appeal is the deadpan setup: a normal household gadget delivering a crude noise on command. That simplicity has kept it in rotation for pranks, edits and reaction videos long after the first shares online.