Cala boca menino is a Portuguese expression that translates literally as shut up boy, and it circulates online as a short reaction sound for Portuguese-speaking creators and audiences. Rather than coming from one widely documented film or television scene, it is best understood as a meme phrase whose humour comes from its blunt, familiar tone. Creators reuse it in short videos, streams and edits to dismiss a comment quickly, and its appeal has lasted because the phrase is instantly recognisable even to viewers who do not speak Portuguese fluently.