Bu yan liao literally means not acting anymore, and online it is used as a shorthand for dropping a pretence. In short videos and chats, people post the clip when someone stops hiding their true feelings, admits a joke, or gives up on keeping up appearances. Its appeal is its brevity and bluntness: a single phrase can end a setup without any explanation. Because the meaning is easy to grasp from context, it travels well between different kinds of videos, from comedy skits to gaming reactions and everyday chat replies.