Regaño translates to "scolding" or "telling off." It's a common word in Spanish, but its prominent and repeated use in this song makes it particularly interesting and central to the narrative.
In the song, the artist sings about his girlfriend's mother constantly scolding her because she doesn't approve of their relationship. The mother believes he's not good enough due to his social class, creating a relatable conflict that many listeners might have experienced.
Blessed's song "Regaños" is all about a guy who's head-over-heels for a girl, but her mom is definitely not a fan! He sings about how they just made love, and right after, her mom calls to bother her, saying "conmigo no por favor" [not with me please] and that she has someone else for her to conquer. But our singer knows the truth: "Pero a ti te gustan mis besos y por eso es que siempre vuelves donde mí" [But you like my kisses and that's why you always come back to me].
He's clearly smitten, saying "Hace dos horas que te vi y ya te extraño" [It's been two hours since I saw you and I already miss you]. The main problem is the mom's constant "regaño" [scolding] because she thinks he's not her type, citing social class and wanting her daughter to marry a rich guy. He challenges this, asking "Dime tú para qué un hombre con dinero, Si vas a mantener sola y aburrida en tu casa" [Tell me, what's a man with money for, if you're going to be alone and bored at home?]. He offers "amor verdadero" [true love] and promises they'll travel the world, even if he's from the neighborhood. He doesn't have a Mercedes, but he's got a plan for Guatape to relax. He reassures her, "No importa tu mai', yo siempre estaré aquí" [Your mom doesn't matter, I'll always be here], because her eyes hypnotize him, and he loves her so much.