Roncar literally means "to snore," but in Caribbean Spanish, it's popular slang for "to show off," "to brag," or "to act tough."
In the song, Rauw Alejandro says, "En la disco me roncó," meaning a woman at the club was fronting on him or acting unimpressed. It’s a fantastic example of the kind of slang that gives urban music its unique flavor and is essential to learn for understanding the culture.
Puerto Rican singer Rauw Alejandro teams up with classic reggaeton duo Alexis & Fido for "Baja Pa' Acá", and they do not waste a second pretending this is a gentle romance. The track is pure, unfiltered underground-style reggaeton packed with wild bedroom braggadocio. Rauw sets the scene immediately by welcoming his partner into his room, declaring that she is in for a long night with lines like "Baby, esta noche es de entierro" [Baby, tonight is a burial] and "Esto es un secuestro" [This is a kidnapping]. He is using dramatic hyperbole to say once she steps inside, she is not leaving anytime soon. From sweating through the mattress ("romperle los springes al mattress" [break the springs of the mattress]) to finding every shortcut to pleasure, the lyrics are shamelessly direct.
Along the way, the verses pack in plenty of colorful Puerto Rican slang and pop references that make the track bounce. When they rap "En el cinco letras la trabajo" [I work her in the five letters], they are using island code for a motel (which spells out five letters), the traditional venue for discreet hookups. Later, they brag that their partner is "Chiquitta como Becky y culona Mini Coop" [Petite like Becky and curvy like a Mini Cooper], shouting out singer Becky G to describe her height and comparing her curves to the wide rear bumper of a compact car. There are no mixed signals here: the song describes a purely physical, high-energy late-night encounter where nobody is complicating things with feelings.