Cagão is a well-known Brazilian Portuguese slang term for someone who is cowardly or afraid to act, and it is widely used in everyday teasing among friends. Online, the single-word callout has become a handy reaction clip for short videos, memes and group chats, where a quick insult lands better than a long explanation. Its popularity comes from that simplicity: listeners do not need a story to understand the joke, just the moment when someone chickens out.