Fluminense is a Brazilian football club from Rio de Janeiro, and o show ta começando means the show is starting in Portuguese. The phrase is used by supporters as a confident chant linked to the team entering the pitch and putting on a performance for the crowd. Clips of the chant circulate among fans on social media and soundboards, especially around match days, derbies and victories, where it works as both a celebration and a taunt aimed at opposing supporters who are about to watch Fluminense play.