Blindadona is a slang term derived from blindado, meaning 'armored' or 'bulletproof'. The suffix -ona intensifies the meaning, suggesting something that is 'heavily armored' or 'super bulletproof'.
In the context of this song, it refers to a heavily armored vehicle or perhaps even a bulletproof vest, emphasizing that even the strongest protection couldn't withstand the attack. It's an interesting word because it's not standard Spanish and gives insight into the street language often found in corridos.
Fuerza Regida and Alfredo Olivas turn a shootout into a first-person account of dying. The narrator feels the air leaving his lungs and blood in his mouth before the song even names what's happening, then runs through the memories that flash by: his mother, his friends, the hustling that got him here. It's blunt about the ending too, singing "Entre Dios y el diablo me tocó morir" [Between God and the devil, it was my time to die] like a shrug rather than a plea.
The corrido doesn't dress up the violence. "Una lluvia de balas, el cuerpo quemaba" [A rain of bullets, my body was burning] repeats twice, and by the second verse not even the armored truck can hold. What sticks is the small, human detail buried in the carnage: "Pensaba en mi madre, cómo iba a sufrir" [He was thinking of his mother, how she was going to suffer]. That's the line where the song stops posturing and starts grieving.