Estornudo otaku is a Spanish phrase meaning an otaku sneeze, and online it is used as a shorthand for the exaggerated, anime-flavoured sneeze style popular in fan edits, reaction videos and short-form comedy. Rather than belonging to one identifiable show or character, the clip circulates as a reusable reaction sound, passed between soundboards and meme collections because it instantly signals embarrassment, cuteness or playful surprise. Its short length makes it easy to drop into edits, which is why it keeps appearing in new videos long after its first uploads.