The phrase comes from Portuguese, where 'não aguenta' means he cannot take it or cannot handle it, shortened online to 'n aguenta.' The Brino clip circulates as a compact reaction sound on soundboards and in short video edits, shared because the wording is instantly understood even in a very brief clip. It has become a reusable shorthand for being overwhelmed, similar in spirit to other reaction sounds, and creators keep using it because it works without context, setup or explanation in memes, streams and chats.