Embrujaste is the past tense of the verb embrujar, meaning "to bewitch" or "to cast a spell on". It's a dramatic and poetic word you won't find in many songs.
In this track, the singer is so unable to get over his ex that he asks, "¿Será que embrujaste a este viejo triste?" (Could it be that you bewitched this sad old man?). He uses this word to express the almost supernatural hold this person still has on him, making it a powerful and memorable way to describe heartbreak.
This song is one of the most direct and angry breakup anthems you'll ever hear. Los Gemelos De Sinaloa are not holding back. The singer is completely torn up over someone who left him. He tries to move on, admitting, "Me la paso con tres morras, pero no te olvido" (I hang out with three other girls, but I don't forget you). He feels like he's been permanently marked by her kisses and even wonders if he's been bewitched, asking, "¿Será que embrujaste a este viejo triste?" (Could it be that you bewitched this sad old man?).
But this isn't just a sad song. It's furious. The singer's frustration explodes into some seriously intense insults, like the one that makes up the song's title, "Vales pura pinche mierda" (You're worth pure fucking shit). He blames her for everything, saying, "Por tu culpa ando pisteando / Me dejaste bien dañado" (It's your fault I'm drinking / You left me really damaged). It's this mix of raw vulnerability and over-the-top anger that makes the song so memorable.