Spinjitzu is the signature martial art of LEGO Ninjago, the animated series that began in 2011, where Sensei Wu trains young ninja to spin into powerful tornado-like attacks. The shouted word became a recognisable catchphrase for fans, repeated in episodes, toys and fan edits long after its first appearances. Short soundboard clips spread through meme and gaming communities because the single word instantly signals training, power and transformation, keeping it useful for creators who want a quick, heroic Ninjago reference without needing any dialogue or context.