Antiromántico literally translates to "anti-romantic." It's an interesting and somewhat unique word because it directly contrasts with the typical romantic themes found in many songs.
In the context of the song, the singer is questioning why the person they like is with someone described as "ese corazón de piedra, tan antiromántico, antipático" (that stone heart, so anti-romantic, unpleasant). This word choice highlights the perceived lack of romance in the rival, making it a memorable and intriguing descriptor.
Gabito Ballesteros turns a classic tale of unrequited love into a playful critique of materialism. The narrator is head-over-heels for someone who has chosen a flashier rival, and his jealousy boils over into a string of questions: How did a "heart of stone" win you over? Is it the new car, the fat bank account, or the well-connected family? Each clue points to the same conclusion—today, love apparently rides on "four wheels," dresses in brand-name clothes, and obeys traffic lights just like any other vehicle.
By repeating the hook "Ahora el amor anda en cuatro llantas," Ballesteros paints a vivid picture of romance reduced to horsepower and tinted windows. It is witty, a little sarcastic, and surprisingly relatable; many listeners will recognize the frustration of watching genuine feelings lose out to shallow status symbols. Performed live, the song feels like a friendly rant shared among pals, inviting us to laugh, sing along, and maybe question how much value we place on shiny toys over sincere hearts.