The phrase is Brazilian Portuguese and spread online as a reusable reaction audio rather than as a clip tied to a confirmed TV show or film. Its appeal is the everyday wording, which anyone can apply to livestreams, hidden camera videos, influencer stunts and suspicious viral moments. Shared in soundboards and messaging apps, it became shorthand for not believing what is on screen. It stays popular because new pranks and staged trends appear daily, giving creators a quick, recognizable way to signal doubt and invite viewers to laugh at the setup.