Presumirle comes from the verb presumir, meaning "to brag" or "to show off". It's an interesting word because it implies a sense of pride and a desire to share that pride with others.
In this song, the artist sings, "Y presumirle al mundo que tú eres solo mía" (And to show off to the world that you are only mine). He's not just happy about his love; he wants to proudly display it to everyone, making it a powerful expression of affection and devotion.
Get ready to swoon! Neto Bernal's "Con Una Sonrisa" is a super sweet declaration of love that will have you feeling all warm and fuzzy inside. He's absolutely head-over-heels for someone, and he's not afraid to say it, thanking heaven for being with her and confessing, "te lo juro no lo había sentido" [I swear I hadn't felt it].
He tells her she's the best thing that's ever happened to him, and that just being by her side makes life meaningful: "si estás junto a mí la vida tiene sentido" [if you're next to me life has meaning]. It's clear her smile and her eyes have completely won him over, making him happy and even a little nervous! He wants to spend the rest of his days with her and shout it to the world: "presumirle al mundo que tú eres solo mía" [show off to the world that you are only mine]. He admits this wasn't his plan, but he's found everything he was looking for in her.