Eaughh belongs to a family of short stretched groans that spread through meme edits and soundboards because they say disgust faster than words can. With no clear dialogue or source line attached, creators treat it as a pure reaction noise and drop it over food fails, cringe clips and gross out jokes. Its length makes it more dramatic than a quick eww, so it is often paired with an eww brother eww moment or left to hang over a pause for comic effect. That flexibility keeps it circulating as a go to disgust sound.