The phrase is Brazilian Portuguese slang for calling out a slip, and the clip circulates mainly as a short reaction audio rather than as a line tied to a widely documented film or show. Its appeal comes from the direct address to povo, or folks, which makes it feel like a public scolding and therefore easy to reuse whenever someone messes up online. In memes, chats and short videos it works as a quick verdict on a fail, and its short length helps it spread as a repeatable punchline.