Arremangando comes from the verb arremangar, which literally means "to roll up one's sleeves." It's an interesting word because it carries a strong connotation of getting ready for hard work, a fight, or serious action.
In the context of this corrido, it implies that the "team of terror" is actively and aggressively getting things done, ready for whatever comes their way. It paints a vivid picture of readiness and determination.
Get ready for some serious action with Betillo Guerrero's "La Vibora Peligrosa"! This song throws you right into the world of a powerful crew, the "equipo del terror" [team of terror]. They're always ready, working "a la orden del señor" [at the lord's command], with a "changuito comandando" [little monkey commanding] – you just know this crew means business!
They're not messing around, stating "aquà no andamos jugando" [we're not playing around]. The lyrics talk about clearing out "todo el terreno" [all the terrain] and even mention some serious "chingazos" [blows] from one side all the way to Caborca. These guys are always on call, "cualquier dÃa y cualquier hora" [any day and any hour], with good gear and a special seal on their hats. It sounds like they're a tight-knit, coordinated group, always ready for whatever comes their way, even if it's just cruising around the "capital del sol" [capital of the sun] listening to a good corrido.