The Spinning Horse, also known as 'Cavalo' (the Portuguese word for horse), is a surreal internet phenomenon featuring a low-poly 3D model of a horse rotating rhythmically, typically set to the song 'Happy H.C.' by Arvid Tuba. The meme gained massive traction on platforms like YouTube and TikTok as part of the '21st Century Humor' or shitposting subculture. Its absurdity lies in its simplicity and the hypnotic, repetitive nature of the animation. Often used in video edits and image macros, the Cavalo meme represents the pinnacle of nonsensical digital humor, where a single word and a spinning animal are enough to generate millions of views and endless variations.