Tralalero Tralala comes from the Italian brainrot wave that spread across TikTok in early 2025, built around AI-generated animals given nonsense Italian names and songs. The character is a great white shark with three legs wearing blue sneakers, and its chant became a shorthand for the whole trend. As creators remixed the shark into edits, gaming clips and reaction videos, the sound travelled far beyond its original posts. It remains popular because it is instantly recognisable, easy to reuse, and funny precisely because it makes no sense.