Enchula'o is a colloquial and very expressive term, a shortened form of "enchulado," which means to be completely smitten or head over heels in love with someone. It's a word that conveys a strong, almost obsessive, romantic infatuation.
In the song, Sech sings, "Pero estoy enchula'o lowkey," meaning he's secretly or subtly completely infatuated. This word is interesting because it's a common slang term in many Spanish-speaking countries, particularly in urban and reggaeton contexts, making it a great word for learners to pick up on contemporary usage.
Sech and Omar Courtz open with Ousi checking in directly, "Baby, te habla Ousi" ("Baby, it's Ousi talking to you"), and from there the song never really leaves the bedroom. The hook keeps landing on the same confession, "Es que me hace adicto a lo que tú me da'" ("It's that it makes me addicted to what you give me"), which is about as blunt as this genre gets: less a love song than an itch he can't stop scratching.
The second half turns him into the guy trying to convince you he's worth the trouble. He name-drops his own trucks and mansions, plays action-movie hero, "Cuan-cuando salgo movie, gritan 'action'" ("Wh-when I step out movie-style, they shout 'action'"), then admits the whole act folds the second she's actually in the room: "Se le zafó un 'te amo' cuando toqué el fondo" ("An 'I love you' slipped out when I hit the bottom"). It's cocky, a little dumb, and knows it.