The phrase comes from Brazilian Portuguese slang, where palhaçada means clowning around or something not to be taken seriously, and it is tagged online with Tropa de Elite, the 2007 Brazilian crime film known in English as Elite Squad. Short spoken lines from the film became popular as reaction sounds in Brazil because of their blunt, commanding delivery. This clip spread on soundboards and in edited videos as a quick shorthand for disbelief, keeping the original Portuguese wording even among viewers who use it mainly for its tone.