The sound comes from the “Avocados From Mexico” advertising campaign, where the phrase became a memorable sung tag line. It spread online because the jingle is short, instantly recognizable, and easy to drop into edits as a fake ad break or food punchline. Meme creators kept it alive by pairing it with sudden cuts, grocery jokes, and absurd reveals. Its staying power comes from how quickly it sets a commercial tone without needing any extra setup.