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Ese chamaco no entiende.
chamaco by Marco Alcazar May 22, 2008
Used in several countries of Latin America (previously thought to have originated in Buenos Aires). Also spelled chamullo and the verb infinitive can be chamullar or chamuyar. Among the various shades of meaning, it commonly signifies speaking on a subject with a pretense of authority, when in reality the speaker is simply inventing, or "bullshitting." It can also mean "sweet talk" such as when a guy is "talking trash" to a girl, saying nothing of substance, for the purpose of socializing. Although these uses are largely Spanish and Pocho slang, "chamuyo" appears to be making inroads into English slang.
Don Fulano was using the chamuyo on Josefina for over an hour last night.
chamuyo by Ratón de Biblioteca September 9, 2010
Devil Spanish from Mexico. Chamuca is a girl devil
Chamuco is a boy devil
My little puppy is the craziest chamuca. She’s a real devil.
Chamuca by Inglewood isn’t July 27, 2018

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!!
chamaco de primera by LOUPS July 28, 2009
Talking to fill the space when you neither know nor care what you are saying but feel it is important to say something.

Pronounced Shamooshow - Found only in Buenos Aires Argentina
A guy chatting a girl up in a bar really does not care where she works or where she is from but wants to keep her attention. The talking is Chamuyo.
Chamuyo by Max Robbins April 1, 2008
a little boy who does spine day everyday in the gym to get the best gains around. Has a borderline mullet and has scholiosis
That nigga is hella chauco bahh”

“Chauco was at the gym working his spine brahh”
chauco by Alpha Z1 August 23, 2021