Bellaquear is a verb derived from the noun bellaqueo, which refers to playful, often sexually suggestive flirting or teasing. It's a common term in reggaeton and urban music.
In the song, "Bellaqueamo' escuchando las olas" (We get freaky listening to the waves) implies a sensual and intimate moment between the singer and his partner, highlighting the playful and suggestive nature of their interaction. It's a word that captures the essence of the genre's themes.
Alejo's "Coco Bongo" is a strutting reggaeton flex about being the guy every girl at the club wants. He starts by noticing someone dancing close to him at three in the morning: "Toda la disco te miraba" [The whole club was looking at you]. From there it's straight into confidence and innuendo, including a very modern brag: "Ya conmigo hiciste el update" [You already updated with me], "Ahora es iOS como en el iPhone" [now you're iOS like on the iPhone].
The hook is basically the album's title spelled out loud. "Reggaetoncito pa' las nenas, yeah" [A little reggaeton for the girls, yeah] is Alejo calling himself exactly what the record says he is, "El Favorito de las Nenas" [The Girls' Favorite]. It's short, repetitive, and blunt about wanting to hook up, built for a night out rather than close listening.