la migra
n.— «The Border Patrol, la migra to the aliens, is desperately seeking to boost its $533-million budget by $41 million.» —“Nightly Ritual: Checker game on U.S. border with people as the pieces” by Ivor Davis in San Ysidro, Calif. Globe and Mail (Toronto, Can.) Mar. 31, 1984. (source: Double-Tongued Dictionary)