Uwu began as a written emoticon in anime fandom, with the two u letters suggesting closed, contented eyes and the w forming a small mouth. As the expression moved from text and fan art into voiced memes, creators started pronouncing it aloud in a high, cute register. Repeating it many times in a row, as in this clip, became a shorthand joke on TikTok, Discord and video edits, where it signals exaggerated cuteness rather than a literal word and works even without any visual context.