Buitre' is a colloquial form of "buitres," which literally translates to "vultures." It's an interesting word choice because it's not commonly found in romantic or reggaeton lyrics, making it stand out.
In the context of the song, the artist uses "buitre'" metaphorically to refer to other men who are circling around his love interest, trying to get her attention. He's essentially calling them predatory, like vultures, highlighting his possessiveness and the competition he feels for her affection.
"24 Horas" is Omy De Oro's take on a secret, round-the-clock romance. He tells his partner he's available any hour of the day, and the two of them keep the relationship just between them, away from anyone else's eyes.
The song leans into physical closeness and devotion, comparing his attention to a weapon always at the ready and promising he'll drop everything else for her. Between the verses he throws in a few playful boasts about loyalty and staying power, all wrapped in a laid-back reggaeton groove.
At its core, it's a song about wanting to be someone's constant, no matter the time or place.