In its standard sense, it refers to anything related to a neighborhood. As a derogatory term, it is used to describe someone or something as ghetto, low-class, or trashy (In the Dominican Republic, a barrio specifically refers to a poor, marginalized urban area).
You told me there were some hotties here, so why are these nappy-headed girls so barriales?
A widespread mindset in the Dominican Republic that local products and services are inferior to anything foreign. (The term refers to Guacanagarix, a Taino chief who welcomed and sided with Christopher Columbus and the Spanish in 1492.)
So many good engineers in this country, and they call a foreigner to oversee the construction project. These people have such a Complejo de Guacanagarix.
To return a phone call. This is a common anglicism (a literal translation of the English phrase to call back used in the Dominican Republic instead of the standard Spanish term).
A group of young people who engage in outdoor activities, led by youth and supervised by an adult with a youthful spirit (Specifically referring to members of the international Boy Scouts and Girl Scouts movement).