Atorrante is an interesting slang term, particularly common in Argentina, that can mean 'rascal', 'scoundrel', or even 'bum'. It often carries a playful, mischievous connotation rather than being purely negative.
In this song, KHEA uses it endearingly when he sings, "Negro, sos mi favorito, atorrante desde cachorrito" (Black, you're my favorite, a rascal since you were a puppy). It highlights a charming, rebellious, and perhaps a bit wild side of the person he's singing about, making it a unique and memorable word in the context of a love song.
KHEA, Duki and La Joaqui build this around one line repeated like a chant: "Quiere ser mi señora, para estar con un gangster" (She wants to be my lady, to be with a gangster). It plays as a love song but reads more like a flex — buying a gun gets framed as care ("Si me compro una pistola, es solo para cuidarte" / If I buy a gun, it's just to take care of you), and the money talk is right there next to it: "Salimos de las malas y ahora vivo como quiero" (We got out of the hard times and now I live how I want).
The verses get a lot more direct from there, down to comparing himself to a video game console: "Juega conmigo, yo soy su Atari" (Play with me, I'm your Atari). By the bridge he's asking for a yacht trip and a joint before the hook rolls back around. It's a Buenos Aires trap record that treats wanting someone, having money and carrying a gun as basically the same thing, and it never pretends otherwise.