Cala a boca macaco is a Portuguese phrase that translates literally as shut up, monkey, and it circulates online as a short Brazilian meme sound rather than a line tied to a single famous film or show. It is commonly shared on soundboards and in messaging chats, where users send it as a quick, humorous rebuke instead of typing a reply. Its appeal comes from its directness and its cultural familiarity in Portuguese-speaking meme communities, where blunt reaction audio travels easily between videos, streams and everyday jokes.