Cristiano Ronaldo popularized the Siu celebration during his Real Madrid years, performing a jump, turn and shout of si, meaning yes in Spanish, after scoring. The chant spread through stadium crowds, television broadcasts and social media clips until the shout alone became shorthand for a goal. Online, the nickname Penaldo, a playful jab at his penalty record, got paired with exaggerated edits of the celebration, turning a sincere ritual into a meme sound used far beyond football highlights and matchday posts.