Artimaña refers to a clever trick, ploy, or stratagem, something used to deceive someone or achieve a goal indirectly through cunning rather than honesty.
In "Maña prepara bien su artimaña y lo que" ("habits, she prepares her trick well and what"), the word suggests careful, deliberate scheming, someone planning their next move with real craftiness.
Eddie Dee's "Transformer" is a super fun, high-energy track where he calls out a certain type of person he sees around. He's talking about the kind of women who seem one way during the day or in certain settings, but completely transform when the sun goes down or they're out having fun. He mentions "las que se ven linda de noche y de día ni las conozco" [the ones who look beautiful at night and during the day I don't even know them] and "las que seguían de fina pero se sueltan después de las doce" [the ones who acted refined but let loose after midnight].
He's got a sharp eye for detail, describing how some act "bien tranquila pero en la calle una vida en dos" [very calm but in the street, a double life] or have a "carita de yo no fui" [an innocent face like 'it wasn't me'] to fool people. It's all about the contrast between appearance and reality, and he's not holding back! He even talks about how some are looking for "carro prenda dinero y champaña" [cars, jewelry, money, and champagne]. It's a playful but blunt look at people who might not be as they seem.