Curvilínea literally means "curvilinear," describing something composed of or bounded by curved lines. It's a sophisticated and less common adjective than simply "curvy."
In this song, Nathy Peluso uses it to describe herself as "Una perra sorprendente, Curvilínea y elocuente" (A surprising bitch, Curvilinear and eloquent). She reclaims the word "perra" and uses "curvilínea" to powerfully and elegantly assert her physical presence and confidence, making it a memorable and empowering descriptor.
Get ready for Nathy Peluso at her most confident and direct! This whole track is a masterclass in self-love and calling out people who are all talk. She starts with some incredibly bold and funny lines, sarcastically calling herself a "mina delicada" (delicate girl) right after some very explicit lyrics. She describes herself as "Una perra sorprendente / Curvilínea y elocuente" (A surprising bitch / Curvy and eloquent), owning her power and her body completely. She even declares, "Este culo es natural, no plastic" (This ass is natural, not plastic), which is a pretty blunt way to say she's proud of who she is.
But the main point comes in the chorus. She's tired of people who act tough over text but are silent in person: "Cuando me escribe suena valiente / Pero de frente no dice ni 'mmm'" (When he writes to me he sounds brave / But to my face he doesn't even say 'mmm'). She mocks this fake confidence, saying she wants to see these "gallito'" (little roosters) do something as simple as kill a cockroach. It's a powerful and hilarious takedown of anyone who can't back up their words with real action.