Flaca literally translates to "skinny girl". While calling someone skinny in English might be sensitive, in many Latin American countries like Colombia, it's a very common and affectionate nickname for a partner or close friend.
It's a term of endearment similar to 'honey' or 'babe'. In the song, Kapo sings, "Ay, mi flaca hermosa" (Oh, my beautiful skinny girl), using this popular term to express his deep affection and admiration.
This song is a super sweet and direct declaration of love! The singer, Kapo, starts by admitting he's done some creative things to get a girl's attention, saying, "me he inventado cosas pa' llamar la atención de ti" (I've made things up to get your attention). It wasn't just her beauty, but her "brillo" (shine) that caught his eye. His efforts paid off, and now he's completely devoted to her.
He calls her "Flaca" (Skinny girl), a common term of affection, and tells her she deserves everything. For him, loving her isn't just a feeling, it's a need: "Amarte es mi necesidad" (Loving you is my necessity). He loves everything about her and wants to take away her insecurities. The song lists all the little things he adores, like dancing with her, how she smells, and how she looks when she wakes up. It's a simple, heartfelt song about finding someone you feel you were destined to be with.