A Narcocorrido (Spanish pronunciation: [narkokoˈriðo], Drug Ballad) is a type of Mexican music and song tradition which evolved out of the norteño folk corrido tradition. This type of music is heard on both sides of the US–Mexican border. It uses a danceable, accordion-based polka as a rhythmic base. The first corridos that focus on drug smugglers—the narco comes from "narcotics"—have been dated to the 1930s. Early corridos (non-narco) go back as far to the Mexican Revolution of 1910, telling the stories of revolutionary fighters. Other music critics have compared narcocorrido music to gangster rap.
Narcocorrido lyrics refer to particular events and include real dates and places. The lyrics tend to speak approvingly of illegal criminal activities such as murder, torture, racketeering, extortion, drug smuggling, illegal immigration, and sometimes political protest due to government corruption.(wiki)