Traviesa is the feminine form of the adjective for "mischievous" or "naughty". It describes someone, often playfully, who likes to bend the rules and have a little fun.
In the song, which is also titled "Traviesa", Young Miko uses the word to describe a girl who is bold and unapologetic. When she sings, "La nena es traviesa y yo me presto" (The girl is mischievous and I'm down for it), she's celebrating this confident, playful, and daring attitude. It's the key word that sets the tone for the entire track.
This song is a straight-up celebration of a wild and intense hookup. The title "Traviesa" means "mischievous girl," and that's exactly who Young Miko and Eladio Carrion are singing about. From the very beginning, Miko makes it clear the feeling is mutual and she wants more, singing, "Mami, lo que hicimo, que se repita" (Mami, what we did, let's repeat it). She says this girl has cast a spell on her: "Lo que me hizo fue un amarre" (What she did to me was a love spell), and now she can't stop thinking about her.
The whole song is full of explicit and funny details about their encounters. They talk about making a movie that's "pa'l Oscar ya está nominada" (already nominated for an Oscar) and getting together everywhere from a boat to a villa. Eladio's verse is just as direct, comparing himself to an undisciplined dog under her control. The core message is in the chorus: "Es una traviesa y yo me presto" (She's a mischievous one and I'm down for it). It's all about two people who are completely into each other's wild side.