Jale is a very common slang word for "work" or "job" in Mexican Spanish, derived from the verb jalar (to pull).
In the song, Peso Pluma sings, "Cosas del jale que no entiende nadie" (Things from the job that nobody understands). He uses this word to add a mysterious and informal tone, hinting that his line of work is secretive and maybe even dangerous, a central theme in his music.
Mexican singer Peso Pluma hits you with an eerie, confessional mood in this corrido tumbado. Right out of the gate, he admits he messed up his own plans: "Dios, no quería desvelarme, y aquí ando en el desmadre" [God, I didn't want to stay up late, and here I am in the mess/chaos]. Mexican slang is everywhere here. He talks about "el jale" [the job/the hustle], complains that the alcohol and drugs have stopped working, and admits he has burned through second chances. There is a wild, guilty image in the chorus where he tucks his rosary beneath his shirt before getting high: "Me escondo el rosario bajo de la camiseta para envenenarme, pa' no sentirme culpable" [I hide the rosary under my t-shirt to poison myself, so I don't feel guilty]. He trusts that "el jefe" [the boss, referring to God] will forgive him anyway, which is pretty bold.
The track mixes church imagery straight into cartel paranoia. He mentions heavy weapons being sent down to Guasave, a city in Sinaloa: "Cuernos y Dracos grandes, me los mandan pa' Guasave" [AK-47s ("horns") and big Dracos, they send them to Guasave for me]. Then comes my favorite blunt line of the track: "En la última cena nadie se llevó al Judas y saben que fue fundamental y yo al traidor sí le di baje" [At the Last Supper nobody took down Judas, and they know he was key, but I took down the traitor]. In street Spanish, "dar baje" means to rob, take out, or eliminate someone. He basically compares his crew's dinner table to biblical history, except this time, the traitor does not get to walk away.