Enbicha' is a slang term, a shortened form of "enbichada" or "enbichado," which means to be intoxicated or high, often specifically from marijuana.
In the song, it describes the girl's state at the club: "Enbicha' porque ella sabe lo que hay" (High because she knows what's up). It captures the rebellious, party-heavy atmosphere of the lyrics and is a unique, informal word that adds flavor to the song's narrative.
This song follows a woman finding her wild side. She used to stay home, but now she's out every night at underground parties, dancing without apologizing to anyone.
The hook is about what happens once the party ends: heading to the beach with someone, having a few drinks, and dancing close until sunrise. It's a lighthearted reggaeton track about nightlife and letting loose, told from the point of view of someone who notices her and wants to keep her company.