The chant comes from the São Paulo derby rivalry between Corinthians and Palmeiras, whose fans and team are nicknamed Porco, the pig. Corinthians supporters have long mocked Palmeiras claims that the 1951 Copa Rio was a world title by singing that 51 is pinga, a reference to the well known Brazilian cachaça sold as 51. The short sung version spread beyond stadiums through WhatsApp audios, football meme pages and soundboards, becoming a quick reply whenever Palmeiras lose, concede or become the topic in Brazilian football banter online.