Empecherado is a cool, modern slang word you'll often hear in corridos bélicos (warlike ballads) like this one. It's a very descriptive term for someone who is wearing a tactical chest rig or body armor.
The word is derived from the Spanish word for chest, pecho. In the song, it's used to paint a vivid picture of the well-armed and prepared characters, literally meaning they have their chests covered. Learning this word gives you a key piece of vocabulary to understand the action-packed world of modern corridos.
This song drops you right into the middle of a high-stakes operation. The narrator is part of a crew, and they are heavily armed. He casually mentions he's carrying a "Kaláshnikov" and that the rest of his crew, "la manada" (the pack), is following behind in a Ford Raptor truck. They're prepared for anything, with a .50 caliber gun just in case.
The lyrics paint a picture of a group that moves between two worlds. Their trucks are dusty, a "Señal que vienen y van / Desde los ranchos para la capital" (A sign that they come and go / From the ranches to the capital). They operate with military precision, with a "teniente" (lieutenant) giving orders over the radio and guys dressed in tactical vests and camouflage. But it's not all business; there's also a mention of luxury items like a "Bolsa de Dior" (Dior bag) big enough to hold a handgun and a "paquita" (wad of cash) that never hurts to have around.