Pendejo is a widespread Spanish slang insult for a foolish or obnoxious person, while impune means unpunished, so the phrase roughly translates to an idiot who gets away with it. As a short audio clip it spread through Spanish speaking meme culture, shared in chats, soundboards and short video edits as a ready made reaction. Its brevity makes it easy to reuse across contexts, from gaming clips to sitcom scenes, whenever a storyline rewards bad behaviour. That universal frustration is why the sound keeps resurfacing despite its tiny runtime.