Cuerno literally means "horn," like on an animal. However, it's also a key part of a hugely popular Spanish idiom: "poner los cuernos," which means "to cheat on someone."
In this song, Bad Bunny makes a clever play on words. He sings that his ex wanted a fantasy love with "unicornios" (unicorns), but instead, "sólo te dieron el cuerno" (they only gave you the horn), a witty line implying she was cheated on. This powerful twist is what makes the word so memorable in the song.
Bad Bunny’s “BYE ME FUI” is a fiery goodbye letter set to a reggaeton beat. The narrator has finally slammed the door on a one-sided, on-again off-again fling: every time the other person gets hurt elsewhere, they come running back to him. This time he is done being the emergency exit. With lines like “Dile adiós a tu mejor opción” and “Baby, sobre mí ya no tienes poder,” he reclaims his worth, reminding the listener that love should never be a backup plan.
Beneath the catchy rhythm lies a message of self-respect and empowerment. Bad Bunny contrasts dreamy “unicornios” with the harsh reality of broken promises, pointing out that modern love can feel half-hearted and seasonal. He owns his hurt, admits his sleepless nights, then drops the ultimate hook: “Bye, me fui” ‑ I’m out. The song encourages anyone who has been taken for granted to hit play, dance it out, and remember they deserve more than a “por si acaso” relationship.