Polluelo literally means "chick" or "fledgling," referring to a young bird. It's an interesting word choice because it's not commonly used in romantic or reggaeton contexts.
In this song, it's used as a slang term of endearment, similar to "baby" or "honey," but with a slightly more playful and perhaps even possessive connotation, implying youth and vulnerability. The line "Porque ese polluelo la presión está sintiendo" (Because that chick is feeling the pressure) suggests the person is young and perhaps overwhelmed by the attention or situation, making it a unique and memorable way to refer to a love interest.
"ESE CULITO" is a flirty, upbeat reggaeton track by Nickoog Clk featuring Dainesitta. The two artists trade verses about physical attraction and wanting to be someone's only one, with Nickoog Clk claiming he's the one who satisfies his partner best and Dainesitta answering back with her own confidence.
The song leans on playful Caribbean Spanish slang and dropped final consonants (like "meti'o" for "metido" and "fie'ta" for "fiesta"), which is typical of reggaeton and dembow. It's a fun way to pick up real, casual Spanish as it's spoken in Puerto Rico and the Dominican Republic, alongside vocabulary for attraction and nightlife.