“Illegal immigrant” since they never planned to immigrate here and become legal citizens but only work and send the money back home to Mexico.
The proper term is,
“Illegal alien.”
“Wetback” is derogatory term used in the United States of America for a person of foreign nationality, historically a Mexican citizen, who is an illegal immigrant in the USA.[1] With the rise in both volume and variety of illegal aliens since the amnesties granted by the Immigration Reform and Control Act of 1986 and subsequent legislation.