Laminadas is slang for armored or bulletproofed vehicles. The word comes from lámina, which means a thin sheet of metal.
In this genre of music, singers often boast about their powerful, modified trucks. The line "Montado en las laminadas" (Riding in the armored ones) creates a vivid image of someone cruising in a bulletproof truck, painting a picture of a dangerous and high-stakes lifestyle. It's a great example of slang that's specific to the world of 'corridos'.
"Si No Quieres No" is a heavy hit of modern bélico corridos from Luis R Conriquez and Neton Vega, and it basically runs on pure adrenaline and cold nerve. The title itself translates to "if you don't want to, then don't"—a shrug of supreme indifference tossed at anyone standing in their way. The narrator wastes zero time announcing who he answers to, shouting out "los Guzmanes" and saying he is "a la orden de Archivaldo" [at the command of Archivaldo]. If friction breaks out, his crew moves instantly: "les hago un cagadero en caliente" [I'll make a mess for them right on the spot]. He readily admits patience is not his thing, claiming he prays to both the devil and death itself, and weirdly enough, drinks warm beer: "a mí me gusta la cerveza caliente" [I like warm beer]. That is either an acquired taste or just someone daring you to say something about it.
Between the chaos, you get a rush of fast-lane street slang. When they cruise the capital city in armored vehicles, they call the trucks "las laminadas" [the plated ones] so bullets bounce right off: "pa' que los tiros pura verga nos entren" [so the bullets don't hit us at all]. You hear about high-speed toys like the "Shelby" and a lifted "Cheyennón" [a big Chevy Cheyenne truck] sporting bulletproof glass ("vidrios duros") and packing a ".50 caliber" firearm, dubbed a "tostón". The look is unmistakable: long hair flying, a massive diamond watch on the wrist, and a warning to anyone watching: "pónganse bien vergas si ando en el sector" [stay sharp if I'm in the neighborhood]. It is fast, reckless, and unapologetically loud.