Green’s Dictionary of Slang

Tijuanero n.

[Sp., a citizen of Tijuana, the border town through which legal immigrants often pass]

(US) a newly arrived immigrant from Mexico.

[US]L. Rodríguez Always Running (1996) 115: Lourdes, from Mexico, looked hard in Pila’s direction. ‘What you looking at, puta tijuanera?’ Pila responded.
M.G. Rubio ‘The Climb’ on Azteca.net 🌐 He wore too much polyester to be considered more than just another Tijuanero.