Solecito is the diminutive form of sol (sun), translating to "little sun" or "sunshine". It's an endearing term of endearment, often used to express affection and warmth towards someone.
In the context of the song, the artist uses solecito to refer to his beloved, highlighting her brightness and the positive impact she has on his life. It's a sweet and intimate way to address someone, making it a memorable and charming word.
"Solecito" turns a nonsense word into a love language. Nanpa Básico builds the whole hook around "shabadada" — an invented syllable the couple trade back and forth with no fixed meaning, just a private code for wanting each other. Around it he plants garden metaphors: "Soy una ramita pa' que me alivien tus soles" ("I'm a little twig, so your suns can ease me") and "Florecita, dame de tu pólen" ("Little flower, give me your pollen"), before dropping the metaphor entirely for "Tengo una cita con tu abdomen" ("I have a date with your abdomen").
The bridge trades flowers for the sky and the hunt: "En un eclipse mi luz con tu luz" ("My light in eclipse with your light") and "No soy un cazador, pero te cazaré" ("I'm not a hunter, but I will hunt you down"). Then the shabadada hook comes back one more time, because some things are still easier to sing than to say.