Nya is the Japanese onomatopoeia for a cat's meow, long associated with catgirls and nekomimi characters in anime and manga. Stretched into nyaaa, it became a shorthand for cuteness in fan edits, forums and soundboards, where a single vocalisation can replace a whole reaction. It sits alongside other staple anime voice clips like tuturu and onii-chan in meme collections, and is still used because it is instantly understood across languages, works without context, and turns ordinary footage of people or pets into a playful anime moment.