Te arrepentirás means “you will regret it.” It combines the reflexive pronoun te with the future form of arrepentirse, making it a useful example of how Spanish expresses a strong prediction or warning.
In the song, the singer tells the other person, “Y te arrepentirás,” warning that they will eventually regret the way they treated him. Its dramatic, unmistakable tone makes it especially memorable.
In "Cuerpo Sin Alma", the singer sits his lover down and finally says what he has held back. It opens like a courtroom: "Y ahora siéntate, allí de frente a mí" [And now sit down, there in front of me], then "Escúchame muy bien y sin interrumpir" [Listen to me carefully and without interrupting]. Living together "inútil resultó" [turned out useless], a relationship "sin alegría, sin una lágrima" [without joy, without a tear]. He admits his part too: "Tu trampa me atrapó y yo también caí" [Your trap caught me and I fell too].
Then the tone turns cold and a little cruel. "Que pase el próximo, le dejo mi lugar" [Let the next one come in, I leave him my place] is how you would call the next person in a queue, and he pities whoever comes after him: "Pobre del que vendrá" [Poor the one who will come]. He accuses her of faking it, "Cómo sabes fingir" [How well you know how to pretend], and the title says what he thinks is left: "Cuerpo sin alma" [A body without a soul]. Learner tip: se te da means "it comes easily to you", and ya no caigo más means "I won't fall for it anymore". The chorus "Y ahora desnúdate, sabes hacerlo bien" [And now undress, you know how to do it well] is blunt, and it is meant to sting.