Derrumbaste is the past tense of the verb derrumbar, meaning 'to demolish' or 'to knock down'. It's a powerful and visual word, typically used to describe destroying a building.
In this intense song, Jennifer Lopez uses it as a dramatic metaphor for a broken relationship. She sings, "Y con tus manos derrumbaste nuestra casa" (And with your hands, you demolished our house), vividly painting a picture of a love and a home being intentionally torn apart by her partner's actions.
Jennifer Lopez hits us right in the chest with the ultimate betrayal confrontation in "Qué Hiciste" (What did you do?). The song maps out a relationship in three strict time zones: yesterday, today, and tomorrow. Yesterday was pure romance, where she says "nos espiábamos el alma" (we spied on each other's souls) and didn't even need words to communicate. But then comes today, and everything crashes down. She calls out her ex for mistaking deep affection for a weakness to exploit, asking directly how he confused all the love she gave him "con un permiso para así romperme el alma" (with permission to break my soul like that). It is dramatic, furious, and wonderfully blunt.
What makes the chorus sting is the vivid domestic destruction: "con tus manos derrumbaste nuestra casa" (with your hands you tore down our house). She doesn't just mean physical walls; she means the entire life, safety, and shared mornings they built together. But J.Lo doesn't stay crushed for long. By the time tomorrow arrives, she promises total erasure. She vows that she won't even waste energy holding a grudge, declaring "mañana ni siquiera habrá razones para odiarte" (tomorrow there won't even be reasons to hate you). She is ready to let the wind blow away every scrap of his memory.