Reprimido translates to "repressed" or "inhibited." It's an interesting word choice because it describes a personality trait rather than a common action or object, making it stand out.
In the song, the singer uses this word to criticize his love interest's current partner, calling him "un tonto que es un reprimido" (a fool who is repressed). This implies the rival is emotionally closed off or unable to express himself, contrasting sharply with the singer's own passionate declarations.
This song is a super direct and passionate plea for love! The singer is completely smitten and isn't afraid to show it, starting with a powerful "ataca Bandido animal grito El grito al grito El grito" [attack Bandit animal shout The shout to the shout The shout] which sets a really intense tone. He tells the person he desires, "tú sabes cómo te deseo, tú sabes cómo te he soñado" [you know how I desire you, you know how I've dreamed of you]. He truly believes they'd be perfect together, saying, "Si tú supieras que soy sincero, yo soy derecho y no me da" [If you knew that I am sincere, I am straightforward and it doesn't give me] and that he could give them "todo hasta mi sol" [everything, even my sun].
But there's a problem: the person already has someone else! The singer isn't shy about his opinion of this rival, calling him "un tipo frío y aburrido, un tonto que es un reprimido" [a cold and boring guy, a fool who is repressed]. He's convinced this other person "no te va" [doesn't suit you] and boldly asks, "Oye mi amor y vamos juntando los cuerpos" [Hey my love, let's join our bodies]. It's a fun, no-holds-barred declaration of love and a bit of a challenge to the current boyfriend!