Moribundo translates to "dying" or "on the verge of death." It's a dramatic and somewhat theatrical word to describe a feeling, making it quite memorable.
In the song, Big Soto uses it to express the intense longing and sadness he feels when his love interest is far away: "Cuando te tengo lejos me siento algo moribundo" (When I have you far away, I feel somewhat moribund). This hyperbolic expression emphasizes the depth of his emotional connection and makes the word stand out.
Big Soto's "Malibu" is a smooth, late-night vibe about a guy who just can't get a past lover out of his head. He's reminiscing about those intimate moments, how "Las horas parecían segundos" [The hours seemed like seconds] when they were together. Now that she's far away, he feels "algo moribundo" [somewhat dying], really missing her presence.
He's holding onto a camisón [nightgown] of hers, and he knows she still has his scent in her thoughts. He's at a party, drink in hand, probably a Malibu, thinking about her and how hard it is to find someone like her. He's even considering calling her, wondering if she'll pick up, and just hoping for a notification of her location. He admits, "Me gustas más de lo normal" [I like you more than normal] and wants to try something more, maybe a movie, a conversation, and then "en la cama experimentar" [experiment in bed]. It's a relatable story of longing and hoping for a second chance with someone who left a big impression.