The phrase comes from Spanish-speaking gaming clips shared online, where diablo is common Caribbean and Dominican slang used for strong surprise. Clips like this spread because shooters create short, repeatable moments that other players instantly recognise, and a shouted reaction can be lifted and reused over completely different games. It is now used far beyond its original match, appearing in highlight reels, fail compilations and ironic edits where the shot was not even impressive, which is part of why the line keeps circulating.