Embriago comes from the verb embriagar, meaning to get drunk or intoxicate. While it literally refers to alcohol, it's often used metaphorically in romantic contexts.
In this song, Farruko sings, "Contigo me embriago" (With you I get intoxicated). He uses this word to express how his partner's presence makes him feel overwhelmed with pleasure and desire, as if he's drunk on her love and company.
Farruko's "Fantasy" is all about that intense, can't-wait feeling when you just want to be with someone. He's not holding back, saying, "Ya yo no me puedo aguantar / Al lado tuyo yo quiero estar" [I can't take it anymore / I want to be by your side]. It's a direct plea for them to stay, "Quédate conmigo no me sueltes bebe" [Stay with me, don't let go, baby].
He wants to spend the whole night and morning together, even joking, "Quiero amanecer y ser tu desayuno" [I want to wake up with you and be your breakfast]. Farruko sees this person as incredibly precious, declaring, "Tu cuerpo bebe para mi es un tesoro" [Your body, baby, is a treasure to me]. He's ready to get lost in the moment, promising to make it unforgettable, and even says, "Si eres un laberinto yo me quiero perder" [If you are a labyrinth, I want to get lost]. It's a fun, passionate track about wanting to be completely consumed by someone.