Derroche translates to "waste" or "extravagance." It's a word that implies a squandering of something valuable, whether it's money, time, or emotions.
In "Culpable," Junior H uses it to describe the state of his relationship, singing, "No entiendo por qué lo nuestro es un derroche" (I don't understand why what we have is a waste). This suggests a sense of regret or confusion over why their connection, which he clearly values, seems to be going to waste or being squandered, making it a poignant and thought-provoking word in the context of the song's emotional narrative.
Junior H's "Culpable" is a really honest look at regret and jealousy after a breakup. Our singer is definitely feeling the sting of seeing his ex with someone new, even admitting, "Y si de otro me entero, si te veo, te celo" [And if I find out about someone else, if I see you, I get jealous]. He knows this new person isn't the "real" one, calling them a "prisionero" [prisoner], and he's been through that feeling before, even losing his footing.
He really misses the good times, remembering how they'd turn on the TV but "no veíamos la peli" [we wouldn't watch the movie] because they were too busy with each other. He admits he tried to follow her path, "Traté de ir por tu sendero" [I tried to go down your path], but lost her tracks. He's clearly still in love, saying, "En el fondo, te quiero" [Deep down, I love you], and he even wonders if she'd forgive him if he tried to get her back. He takes full responsibility for things ending, declaring, "Pero yo soy el culpable" [But I am the guilty one]. It's a raw and relatable song about wishing you could turn back time.