Angry protesters sprayed graffiti on the walls of Bank Boston after the government froze bank accounts in December 2001. Chorros means thieves. It is not a Spanish but a Lunfardo word. Lunfardo is a slang that is used in the Tango lyrics. It was spoken by the immigrants from Italy, Spain and Eastern Europe at the beginning of the century. The immigrants were poor people that lived in San Telmo, La Boca and Barracas neighborhoods of Buenos Aires. Lunfardo helped them to communicate without the authorities knowing what they were talking about.