Deságua comes from the verb desaguar, meaning "to flow into" or "to empty into," typically referring to a river flowing into a larger body of water.
In this song, Luan Santana uses it poetically: "Como um rio deságua em mim" (Like a river flows into me). It's a beautiful metaphor for how love, like a powerful river, completely engulfs and becomes a part of him, making it a unique and evocative word choice.
In "É Minha Vida," Luan Santana paints a picture of a love that is all-consuming and life-defining. The lyrics describe a person who is his entire world, his "life" (vida). She is his happiness, his direction ("the South, the North, my country"), and a force of nature that can clear away his storms. This isn't just a simple crush; it's an uncontrollable "passion that has no cure" (paixão que não tem cura) and a feeling so intense it's described as a "god screaming inside of me."
However, the song contrasts this passionate devotion with feelings of deep despair and heartbreak. Using powerful images like a "wounded bird" (pássaro ferido) and a "drying river" (rio que está secando), the singer expresses a profound sense of loss and loneliness. His heart is broken, and he feels like he is just "living for the sake of living" ('To vivendo por viver). The song captures the extreme highs and lows of a love that is both everything and, perhaps, now gone.