Baller originates from chapter four of "Boss Fighting Stages Rebirth," a Roblox experience where you fight enemies and bosses through a number of stages as a variety of character classes, created by SuperCloud9 on November 30th, 2013 But later that in 2023, the baller meme became popular

Source: https://roblox-slap-battles.fandom.com/wiki/Baller#:~:text=Baller%20originates%20from%20chapter%20four,SuperCloud9%20on%20November%2030th%2C%202013.