Borondo is a cool and very specific Colombian slang word for going on a stroll, wandering around, or partying. You definitely won't find this one in a textbook!
In the song, Beéle sings that he hopes the girl makes him settle down "del borondo" (from the wandering/partying). He's saying he's ready to trade his carefree, party-boy lifestyle for her love, which is a pretty romantic and modern declaration.
Colombian reggaeton star Beéle brings pure tropical swagger in "Top Diesel", a track all about that instant, overwhelming crush where common sense goes straight out the window. Everyone around him gives the exact same warning: "No te vayas a enamorar" ('Don't go falling in love'). Even his mom gets involved—"Hasta lo dijo mi cucha" ('Even my mom said it', with cucha being everyday Colombian slang for mother). But seeing a girl he rates as "top diesel, top de cara, top princess" (top-tier power, top-tier face, top princess) makes resistance impossible. His heart literally laughs in his face because he just cannot say no: "Yo no sé decir que no" ('I don't know how to say no').
The lyrics are packed with colorful Colombian street slang and funny domestic daydreams. He is so hopelessly hooked that he wants to settle down and stop partying in the streets—"Que me ajuicie del borondo" ('That she makes me settle down from roaming around', where borondo means cruising or wandering without a plan, and ajuiciarse means to shape up and behave). He even jokes about eating so well in a happy relationship that his cheeks get chubby: "Si mi tía me ve cachetón, diga, 'carajo, el amor engorda'" ('If my aunt sees me with chubby cheeks, let her say, 'damn, love makes you fat''). It is cheeky, unapologetically direct, and full of the fun, flirty energy of letting yourself tumble headfirst into romance.