“Corazón Frío” is a blunt breakup song about someone who was hurt, got over it, and refuses to take their ex back. He admits, “Tú me dejaste lastimado” [You left me hurt], and says he was “clavado” [stuck on you or deeply affected], but only for a while. Now, he tells the ex to stop calling and accept responsibility: “fuiste tú quien la cagaste” [you were the one who messed up]. The slang makes his message sound direct and familiar, while “la neta” means “honestly” or “the truth is.”
The funniest and sharpest image is “ya eres un cero a la izquierda” [you’re now a zero on the left], an idiom for someone who no longer matters. He rejects tears as a way to fix the damage and says he has “un corazón duro y frío de a madre” [a very hard and extremely cold heart]. “De a madre” is Mexican slang that intensifies the phrase, similar to “extremely” or “as hell.” When he says, “Devoluciones yo no acepto” [I don’t accept returns], the breakup becomes a store-policy joke: she said goodbye first, and now there are no refunds. His final message is simple and firm: leave, because he does not love her anymore.