chamaco
Spanish slang for kid, brat.
Ese chamaco no entiende.
chamaco de primera
A person, usually a boy, that pretends to act mature and responsible when, in fact, has not grown any pubic hairs. Tends to run away from responsibilities, problems, and obligations. Has a tendency to also deny his immaturity. Literal translation to english--first rate boy
He isn't a man, he is a CHAMACO DE PRIMERA!!