Partideiro refers to someone who participates in or composes partido alto, a subgenre of samba characterized by improvised singing and a strong rhythmic base.
In the song, the artist proudly declares, "Eu sou patente alta, sou partideiro nato" (I'm high-ranking, I'm a born partideiro). This word is interesting because it's specific to the samba world and highlights the artist's identity and skill within this musical tradition, making it more unique than common vocabulary.
Fabio Brazza's "Partido Alto" is a super fun and relatable track about a tough guy, a "malandro" [rascal], who gets completely disarmed by a woman. He thinks he's all street smart and untouchable, saying things like "Eu sou patente alta, sou partideiro nato" [I'm high-ranking, a born party-goer]. He's a skilled rapper, even Xande de Pilares, a famous samba singer, called him "brabo" [awesome]! But then this woman comes along, and suddenly he's a mess. She "me tira do salto" [takes me off my high horse], "me tira do sério" [makes me lose my cool], and "me toma de assalto" [takes me by storm] just with a look and a smile. He realizes that "Não existe malandro quando 'tá apaixonado" [There's no rascal when he's in love] and admits, "Eu achava que era malandro, mas sou só um zé" [I thought I was a rascal, but I'm just a nobody].
It's a really playful take on how love can humble even the most confident person. He feels like his heart is getting stomped on, "E ela pisando no meu coração de salto alto" [And she's stepping on my heart with high heels], but he's still promising to play his "partido alto" [a style of samba] for her. He even says, "Malandro acha que é malandro, mas a mulher que é" [A rascal thinks he's a rascal, but the woman is]. It's a cool mix of bravado and vulnerability, all set to that infectious samba beat. You can feel his struggle between trying to be cool and just being totally smitten.