Guacala is common Spanish slang for expressing disgust, similar to saying ew or yuck in English, and que asco adds the sense of how gross. Online, the phrase became a reusable reaction clip rather than a line tied to one known show or creator. Short voice reactions like this spread through meme pages, group chats and soundboards because they work without context and can be pasted onto almost any unpleasant moment. Its lasting appeal is simplicity: one phrase, one clear emotion, and a delivery exaggerated enough to be funny instead of genuinely unpleasant.