Janguear is a fun, informal word that means "to hang out" or "to party". It's a Spanglish term, derived from the English phrase "to hang out", and is very common in Latin American youth culture, especially in reggaeton and urban music.
In the song, CNCO sings, "Y cuando la llamo para janguear, mira lo bonita que se pone" (And when I call her to hang out, look how pretty she gets). It perfectly captures the casual, flirty vibe of getting ready for a night out.
"De Mí" is CNCO doing what they do best: a reggaeton-pop come-on that switches between Spanish verses and an English hook without missing a beat. It opens slow, "No sé si me conoces" [I don't know if you know me], "Nada más te he visto a ti una vez" [I have only seen you once], one glance and he's already gone. Then the hook drops the pretense and just says it in English, "'Cause I know that this ain't love" and "It's just in between us."
The back half turns into a straight flirtation game. "Ven dale, back it up" and "Que you know what's up, girl" ride the same beat as the opening chorus, repeated almost word for word, like the song can't stop circling back to it. By the bridge he's bragging a little too, "Yo sé que quieres que te lleve a todos mis performance" [I know you want me to take you to all my performances]. It's a song about wanting someone and saying so out loud, nothing more complicated than that.