Sicaria literally translates to "hitwoman" or "assassin." It's a striking and somewhat unexpected word to find in a romantic context, making it very memorable.
In this song, the artist uses "mi sicaria" as a term of endearment, describing his lover as someone who has completely captivated him, as if she's 'assassinated' his heart with her charm and beauty. This metaphorical use adds a unique and intense flavor to the romantic lyrics.
Rochy RD's "Delincuente En Sentimiento" is a super fun and passionate track about a guy who's completely smitten, even if he can't always be with the person he loves. He talks about how his life changed when she came into it, describing their moments together as "de vainilla y chocolate" [like vanilla and chocolate]. He even calls her his "sicaria" [hitwoman] because she's stolen his heart!
He admits he's a bit of a "delincuente" [delinquent] and might not always have money, but he's always trying to find ways to buy her things or just be with her. He's so into her that he says, "no hay nadie que me guste más que tú" [there's no one I like more than you]. It's a sweet, slightly chaotic declaration of love from someone who's head over heels and isn't afraid to show it, even if he's a bit of a bad boy.