Al chile is popular Mexican slang that means "for real" or "honestly". The literal translation, "to the chili pepper", makes it a fun and memorable phrase that doesn't make logical sense on its own!
In the song, Xavi sings, "Al chile, que te vaya bien". He uses this slang to add a raw, honest punch to the final goodbye, essentially saying, "For real, I hope it goes well for you." It's a fantastic phrase to learn if you want to sound more like a native speaker from Mexico.
This song by Mexican artist Xavi is the ultimate anthem for when you're done with someone's games. He's not sitting around feeling sorry for himself. Instead, he's basically saying, "Y si se va, pues, que le vaya bien" (And if she leaves, well, I wish her well) because he has no time to waste. He's completely over it, claiming "Hay fila atrás de ti" (There's a line behind you) and making it clear that "Lo que tiro no vuelvo a recoger" (What I throw away, I don't pick back up). He's even deleted everything from his phone: "Borré las fotos y los mensajes" (I deleted the photos and the messages).
But just when you think it's all about ego, he hits you with the real feeling behind it all. He calls her out, saying, "Qué corazón de piedra" (What a heart of stone). It turns out all his confidence is a shield for his hurt. He admits, "Qué triste que nunca te diste cuenta / Que yo siempre te amé" (How sad that you never realized / That I always loved you). So while he's putting on a brave face, he's really calling her out for never appreciating his love. It's a perfect mix of heartbreak and taking your power back.