Jalarle literally means "to pull it" or "to pull on it." However, in the context of this song, and often in street or regional Spanish, "jalarle al gatillo" is a common idiom that means "to pull the trigger."
This phrase is particularly interesting because it's a raw and direct expression related to the song's themes of danger, survival, and a life intertwined with conflict. It's not a word you'd typically find in everyday conversation, making it memorable and impactful for a learner.
"Veterano" is a hardened corrido told from the point of view of someone who has spent years surrounded by violence and carries the weight of it. The singer describes fighting through sleepless nights, defending what he calls his homeland with everything he has, and being unable to shake the thoughts that come to him even when he prays.
He grew up in a rough environment where school never really felt like an option, and where survival meant learning to handle a gun without hesitation. He admits to having taken lives and to losing men of his own, yet insists his nerves are steel and that fear doesn't show on him.
By the end, the song paints him as someone who has gone cold from repetition: his hand doesn't tremble anymore, and whatever he has lived through, he keeps moving forward like it is simply what war demands.