Pendejo is a common slang term in many Spanish-speaking countries, often used to mean "idiot" or "fool." While it can be quite strong, in this context, it's used to express a feeling of being left hanging or made to look foolish.
Cris MJ sings, "No me dejes como un pendejo" (Don't leave me like a fool), highlighting his frustration and vulnerability after being ghosted. It's an engaging word that captures the raw emotion of the song.
Cris MJ spends this song trying to out-party a breakup and not quite managing it. The chorus states the damage plainly — "Me dejaste solo y vacío, con el corazón negro" (You left me alone and empty, with a black heart) — and the verses are the cure he prescribes himself: the club, smoking, "Un Moet, dos Moet" (One Moët, two Moëts), somebody else to dance with. It doesn't take. "Aunque no es lo mismo si no estás aquí, mujer" (Although it's not the same if you're not here, woman) is the line that undercuts the whole night out.
Underneath the swagger he is mostly asking her to answer her phone. "Si te llamo al celu, cógelo" (If I call your cell, pick up), "No me dejes como un pendejo" (Don't leave me like an idiot) — and he will take whatever is left, "Aunque sea por teléfono" (Even if it's over the phone). The touring is part of what broke it: "Con to' esto de la gira tú te pones atrevida" (With all this tour stuff, you get daring). Progress arrives late and small, in "Pero de a poco yo estoy bacano" (But little by little, I'm doing fine) and the proverb Spanish reaches for at times like this, "Al mal tiempo, buena cara" (Put on a brave face when times are tough). Then a girl texts that she will be there in five, he puts on perfume, and the night starts over.