Al carajo is a powerful and very common slang phrase in Spanish that means "to hell with..." or "screw it". It's a super expressive way to show frustration or to forcefully dismiss something or someone.
In this emotional song, the singer exclaims, "Al carajo todos esos besos que me regalaste" (To hell with all those kisses you gave me), angrily casting aside the memories of his past love. Learning this phrase is a great way to understand the real, passionate language used in modern Spanish music.
Moving on is messy, and Marca MP does not pretend otherwise in this Regional Mexican breakup track. The singer admits that the person was "la única persona con la que podía ser yo" (the only person I could be myself with), which makes letting go sting even worse. Still, he repeats the blunt title phrase "ya acabó" (it is already over) like a mantra to keep himself from running back. He swings back and forth between fond memories—like holding his ex until they fell asleep ("en mis brazos te dormías" [you fell asleep in my arms])—and pure frustration with how broken his heart ended up.
The real turning point comes with a petty, relatable dose of modern annoyance. He tosses all past affection out the window with "al carajo todos esos besos" (to hell with all those kisses). Then he notices a new picture on his ex's status update ("foto de tu estado"), even though his ex never kept photos of him on their phone. It is a sharp little reality check that makes him finally declare "hoy ya soy feliz" (today I am happy) and close the door on the relationship for good.