Cursilería translates to "cheesiness" or "sappiness." It refers to overly sentimental or corny expressions, gestures, or decorations.
In the song, Kany García initially declares, "Que ya pasaron esos tiempos de cursilería" (Those times of cheesiness are over). She's saying she's past the point of wanting overly romantic or cliché gestures, only to find herself falling in love and embracing those very things. It's a fun and relatable word that captures a common sentiment about love.
Have you ever sworn off love, only to have someone special completely change your mind? That's the heart of Kany García's song, "Agüita e Coco." The singer begins by telling us she had given up on romance, thinking that flowers, sweet gestures, and relationships weren't for her. She was perfectly happy on her own and had bet against ever falling in love again.
But, as she sings, her plan completely backfired! Someone came into her life without any warning, sneaking into her dreams and putting a "spell" on her heart with just a kiss. Now, she's so captivated that she imagines a deep future with this person and ignores everyone else's calls. She compares this newfound love to drinking refreshing coconut water (agüita 'e coco), something natural, sweet, and irresistible that is making her and her new love go "loco" little by little.