Bellaquera is a colloquial and somewhat vulgar term that refers to a strong feeling of lust or horniness. It's a word that expresses intense sexual desire.
In the song, the lyric "Me dio una bellaquera otra vez a las tres" (I got horny again at three) directly uses this word to describe a sudden surge of sexual arousal. It's a raw and explicit term that is quite common in reggaeton and urban music, making it an interesting word to learn for understanding the genre's vocabulary.
"Polanco" is a reggaetón flex track. Kevin Roldán, Dani Flow, and producer Mauro Dembow trade verses about partying in Polanco, an upscale Mexico City neighborhood, and living large: designer clothes, money, and a string of romantic conquests.
The lyrics are unapologetically boastful and explicit, mocking rivals and exes while the artists talk up their own status and swagger.
By the closing lines the song turns into a victory lap, with the artists calling out their own names and their crew, "Los Duracos," as the final flex.