Marcado translates to "marked" or "branded". It's a powerful word used to describe leaving a permanent impression on something or someone.
In the song, Rauw Alejandro sings, "Si mi nombre en tu piel marcado se quedó" (If my name was left marked on your skin). He uses this intense metaphor to express that his love was so unforgettable that it left a permanent mark, one that his ex's new partner can never erase. This dramatic imagery perfectly captures the song's themes of passion and possessiveness.
This song is one big, confident message to an ex who has moved on... or has she? Rauw Alejandro is convinced she hasn't. He's not buying her act for a second, singing, "¿Que ya no piensas en mí? mírame a los ojos, que no te creo" (That you don't think of me anymore? Look me in the eyes, I don't believe you). He's full of bravado, telling her to inform her new boyfriend of his place in her history: "Bebé, tú dile a él que antes que todo yo fui el primero" (Baby, you tell him that before everything, I was the first).
But underneath all that confidence, he's clearly hurting. He admits to lonely nights with a "cenicero lleno" (full ashtray) and crying into his pillow. He mixes these vulnerable moments with very specific, intense memories of their physical connection, asking if her new guy can possibly compare. The song ends with a moment of resignation, "Tengo que dejarte volar" (I have to let you fly), but he can't resist getting the last word in, repeating that powerful claim: "Yo fui primero" (I was first).