What does «mocoso» mean in Spanish?

Having a runny nose or other areas full of mucus.

Examples of use in Spanish: "se me acercó un mendigo mocoso a pedirme monedas".

"estoy mocoso por el resfriado".
Applies to children who are ill-mannered or overly conceited.

Examples of use in Spanish: "¡aquel mocoso maleducado me faltó el respeto!".
Inexperienced, immature youth who pretends to behave with a maturity he lacks; brat.

Examples of use in Spanish: "aún eres un mocoso como para volver tan tarde en la noche".
Child, child, boy.

♦ Used in: Argentina - Chile - Colombia - Ecuador - Peru

Examples of use in Spanish: "te vio cara de mocoso y se burló de ti de lo lindo", La tía Julia y el escribidor, Vargas Llosa - 1996.
Young man distributing drugs; díler.

♦ Used in: Salvador
Insignificant, small, of little value or importance.