The word nani is the Japanese word for what, and short surprised reactions built around it have become a staple of anime meme culture online. Fans lift these brief vocal moments from shows, stretch and re-upload them with playful spellings, and reuse them as shorthand for disbelief in edits, reaction videos and short-form posts. Because the sound needs no translation to land, it travels easily between anime fans and wider meme audiences. Its brevity and instantly readable shock keep it useful as a quick punchline.