The elongated Mikuuuu call, a playful shout of Hatsune Miku's name that creators use as a reaction, intro sting, or anime meme sound effect.
Mikuuuu is a long, drawn-out call of the name Miku, stretched across several seconds with a rising, sing-song energy that feels half shout and half cheer. The voice holds the final vowel, giving it a playful, slightly dramatic edge that lands instantly even without any other context. It works because the name itself is so recognisable to anime and Vocaloid fans, so hearing it extended like this reads as excitement, greeting, or a loving tease. Dropped into a video, it grabs attention, sets a lighthearted tone, and makes a simple entrance or reaction feel bigger and more memorable.
Hatsune Miku is a virtual singer created for Vocaloid software, and her name has become shorthand for anime and internet music culture. Fan-made clips that simply call her name, stretched out for comic effect, circulate widely on soundboards and short-form video, where they work as a quick signal to other fans. The appeal is recognition rather than a specific scene: anyone who knows Miku understands the joke at once, so the call keeps being reused as an intro, greeting, or hype sound in new edits.