- (derogatory, slang, California) The transformation of California by infusion of Mexican culture especially as a result of illegal immigration.
- 2004 June 4, "Iconoclast", "Terminating California?", alt.politics.immigration, Usenet 
- What Governor Schwarzenegger is proposing is the de facto Mexifornication of California.
- 2004 September 27, Alan K. Stebbens, "Mexifornication Of California", Alan's Radio Weblog, at www.stebbens.org/alan/blogs/ 
- Since most of these illegal immigrants are Mexicans, it is a "Mexifornication" of California.
- 2005 November 3, Jimmy Mac, "1 AM Bike Riders - Watchout [sic.] Neighbors", sonoma.general, Usenet 
- It was always a small group of latino's [sic.] on stolen bikes.... Just another example of the "cause and effect" of the Mexifornication of Sonoma County.
- 2006 May 24, "Katie's Dad", "Why this is our last chance to save this nation from history's dustbin", Unabashedly Unhyphenated, at www.americankernel.com 
- The presence of such a malignant cultural factor in even the smallest significant numbers can only lessen us.... The Senate believes that its job is to impose this Mexifornication upon us all
- 2004 June 4, "Iconoclast", "Terminating California?", alt.politics.immigration, Usenet