Bellaquita is a diminutive of bellaca, which is a slang term often used in reggaeton and urban music. It translates to "naughty girl" or "horny girl," implying someone who is sexually playful and uninhibited.
In the context of the song, it's used repeatedly to describe a woman who is sexually expressive and enjoys intimacy. The artists use it to encourage her to let loose and not hold back her desires, even if it means making noise that neighbors might hear.
Dalex opens "Bellaquita (Remix)" still stuck on someone at 3:30 in the morning, and by the second verse the song turns into a full posse cut, with Lenny Tavárez, Farruko, Anitta, Natti Natasha and Justin Quiles each taking a turn. The hook says the plan outright: "Ponte encima de mí, bellaquita" (Get on top of me, you little freak), repeated so many times it becomes the whole point of the song.
What makes it fun is how far it pushes the noise-complaint bit. "Que los vecinos se enteren" and "Y si llegan los guardias, que esperen" (Let the neighbors find out, and if the cops show up, let them wait) turns into an actual scene by the third verse, where an officer shows up mid-hookup and gets talked down. Dalex even reaches for a horror movie to describe how far gone he is: "Vampira, llego Van Helsing y voy a clavarte la estaca" (Vampire girl, Van Helsing's here and I'm gonna drive the stake into you). Five artists trying to one-up each other's bragging, and it never slows down long enough to take itself seriously.