The phrase comes from Spanish speaking football culture, where the B refers to the second division a club drops into after relegation, and rival fans sing it as a taunt during matches. It became widespread in Argentina around relegation battles in the early 2010s, then spread through broadcasts, terrace videos and social media clips across Latin America and Spain. Online, the chant escaped the stadium and became a joke for any failure or demotion, shared in group chats and edited into highlights whenever a big team struggles, often paired with crowd cheering in fan edits.