No clear source work, character or original recording is documented for Eueueuueueur, so its life is mainly online as a short shareable clip rather than a known scene. The title is simply the noise written out, which makes the stretched vowels the whole identity of the sound. It circulates alongside other confused vocal sounds like eh eh ehhhh and anime ahhhh in meme edits and reaction videos. Its short length keeps it easy to loop, layer or drop into a pause without needing any setup or context from an original show.