Vaciado literally means "emptied out" or "drained". While its root vacío (empty) is common, the past participle vaciado used in this context is more evocative and less frequently featured.
In the song, the artist sings, "Mi corazón vaciado" (My heart emptied out). This powerful image conveys a profound sense of loss and emotional desolation, making it a striking and memorable word that captures the song's melancholic theme.
This song is about trying to numb heartbreak and failing. The singer leans on weed and drinks to feel better after being left by someone he can't stop thinking about.
He keeps circling back to her - still in love, still waiting, still hoping the drinks will fix what's broken. By the end he gives up trying: nothing has worked, and he decides he just isn't made for love.