The phrase is Spanish slang roughly expressing shocked disbelief after someone hurts themselves, similar to reacting to a painful hit. Short shouted audios like this spread through meme pages, messaging apps and short video edits because they are easy to reuse out of context. The clip has no clear widely documented original source, so its life online is mainly as a reaction sound, detached from any single video and applied to new falls, hits and accidents where the over the top delivery makes the moment funnier.