The Collaborative International Dictionary of English v.0.48:

Mexicanize \Mex"i*can*ize\, prop. v. t.
   To cause to be like the Mexicans, or their country.

   Note: At one time this word referred to frequent revolutions
         of government, considered characteristic of Mexican
         politics.
         [1913 Webster +PJC]

The Collaborative International Dictionary of English v.0.48:

Mexicanize \Mex"i*can*ize\, prop. v. i.
   To become like the Mexicans, or their country or government.
   [1913 Webster]