It is not Spanish but English, but wannabe (Uanabí "imitator") is used in our language as a mockery for the tilingos, the "aspirational" who pretend to be of a higher social class, and who usually admire the American way of life (where it is spoken in English; I say, in case it needs to be clarified). It's a contraction of the phrase want to be. See threaded ass.