Mexodus 

Mass emigration from Mexico, especially into the United States.

John McCain seems pretty upset about the Mexodus, probably because he's racist.

Mexodus by The Goddamn Kid May 11, 2010

mexidus 

The outflux of illegal immigrants back to Mexico because of INS raids, intolerance, and a bad economy.

"Well I guess there must have been a Mexidus because my landscpaping crews didn't show up this week."

mexidus by 60 Central April 22, 2008