Riverso is a creative, made-up word that you'll only find in this song. It's a beautiful blend of reversa (reverse) and verso (verse), and it's also a clever play on the word universo (universe).
Residente sings that the person he loves is a 'riverso' who has literally turned his universe upside down, making the impossible seem possible. This poetic invention perfectly captures the song's magical, world-altering vision of love.
This song is one of the most over-the-top, beautiful love songs you'll ever hear. Calle 13's Residente describes someone whose beauty completely changes the laws of nature. The sun itself is so intimidated it hides, because as he says, "Tú pintas el paisaje mejor que él" [You paint the landscape better than it does]. The praise gets even more extreme and creative. He claims this person's beauty smells like the morning and "me da de comer durante toda la semana" [feeds me for the whole week]. The sun doesn't even need to show up anymore, because "La vitamina D me la das tú con un beso" [You give me Vitamin D with a kiss]. It's a song built on huge, impossible compliments that feel completely sincere.
The second half of the song imagines a world turned upside down by this person's existence. It's a utopia where everything is reversed for the better. The Earth stops spinning, and instead, "tú giras por La Tierra" [you spin for the Earth]. In this new reality, wars are settled with kisses, chickens moo, and cows cluck. More seriously, he imagines a world where dreams become real, military academies teach medicine, and bankers build houses for people. It all happens, he says, "Gracias a ti y a tus ojos" [Thanks to you and your eyes].