Chamaquito is a colloquial term, particularly common in some Latin American countries, meaning 'kid' or 'little boy'. It's a more endearing and informal way to refer to a child than the standard 'niño'.
In the song, Tornillo uses it to reflect on his past, stating, "Siempre tuve mente lista desde que era un chamaquito" (I always had a sharp mind since I was a kid). This word adds a touch of authenticity and regional flavor to his narrative, making it relatable to listeners familiar with the slang.
"Me Pelo Pa'l Gabacho" opens with a plan, not a boast: "Me pego pal' garcho y hago feria' de los malditos" [I'm heading to the U.S. and making that damned money]. Tornillo isn't singing about a life he's dreaming of; he already left, and his parents notice the difference first. "Papá ya está feliz de lo que su hijo hace" [Dad is already happy with what his son does], and he bought his mom a new house. That's the arc of the whole song: he left, he hustled, and it paid off.
What holds the song together is loyalty over money. He calls his crew from the street his brothers, not employees: "A la familia de la calle, los quiero como mis hermanos" [To the street family, I love them like my brothers]. When the hook comes back around to "Somos de barrio, donde quieras somos solos" [We're from the hood, wherever we go, we're in a class of our own], it reads less like a chorus and more like a rule he lives by. He name-checks San Luis Potosí, Monterrey, Guanajuato, Houston and L.A. before he's done. The money changed his house. It didn't change his address book.