Marcelo Bielsa is the Argentine football manager nicknamed El Loco, best known in England for transforming Leeds United between 2018 and 2022 and ending their long wait for Premier League promotion. His intense style and cult personality made his name a terrace chant, sung by supporters to honour him. Short clips of the chant spread through football fan edits, tribute videos and memes, where the name alone signals tactical genius and devotion. It remains a staple for Leeds content and wider football meme culture online.