De manual literally translates to "of manual" or "by the book." It's an idiomatic expression used to describe something that is typical, predictable, or follows a standard, often clichéd, pattern.
In this song, the artist uses it to describe the predictable and unoriginal excuses given during a breakup, like "Es lo mejor para los dos." It highlights the frustration with common, uninspired phrases used in difficult conversations.
Have you ever been in that moment where you just know a breakup is coming? That's exactly where Yami Safdie and ENEZ 4R take us in "De Manual." The song kicks off with that dreaded phrase, "Tenemos que hablar" [We need to talk], and you can feel the anxiety building, making it hard to breathe. The singer spends hours wondering what went wrong, but this time, she's determined not to cry.
She's heard it all before and doesn't want to hear the "excusas de manual" [by-the-book excuses] because they won't change the fact that she's going to get hurt. She's not buying the "Es lo mejor para los dos" [It's for the best for both of us] line either. She knows things felt right at the beginning, but his energy changed; he stopped having fun and smiling. The uncomfortable minutes turned into hours, and now, "Cada uno por su lado" [Each one on their own]. It's a blunt, honest look at the end of a relationship where one person is just over the other's predictable breakup script.