Fina is an adjective that means "fine," "classy," or "refined." It's typically used to describe someone or something that is elegant and sophisticated.
In this song, Bad Bunny and Young Miko use the word ironically. They describe a woman who is both "fina" and sexually liberated, challenging the idea that a classy woman must be reserved. The song's hook suggests that true class lies in confidence and freedom, making this a very interesting and modern use of the word.
Bad Bunny and fellow Puerto Rican artist Young Miko team up for "FINA," a song that celebrates a woman who completely rejects social labels. The title itself means "classy" or "refined," but the lyrics immediately get into how this woman is so much more than that. She's described as a "mujer alegre, fina / Pero le gusta la calle de PR, diva" (a happy, classy woman / But she likes the streets of PR, a diva). The song's whole point is that a woman can be sophisticated while also being sexually liberated, independent, and in control.
They get very specific and very explicit about this freedom. Young Miko raps that the woman "se tira a hombres y también mujeres" (gets with men and also women), while Bad Bunny details their wild encounters from the Gucci fitting room to her sister's house. The central message is a powerful and blunt rejection of anyone's judgment. They chant "Digan lo que digan, vamos a gozarnos la vida" (Whatever they say, we're going to enjoy life) and end with the advice to "Mami, sé tú y que se joda" (Mami, be yourself and fuck it). It's a song about living exactly how you want, especially if it makes other people uncomfortable.