The phrase comes from Spanish speaking football culture, where la B is shorthand for the second division and a symbol of relegation. Online it escaped the stadium and became a general meme for any drop in status, shared as a short voice clip in football debates, gaming chats and reaction edits. Its life on soundboards comes from how little setup it needs: three seconds of chanting tell the whole joke, so creators reuse it whenever a result, ranking or performance clearly goes downwards.