tex-mex

adjective

1. of or relating to aspects of culture that combine Mexican and Texan or southwestern U.S. features, especially aspects of culture developed in southern Texas based on or influenced by Mexican elements: Tex-Mex cooking; Tex-Mex music.

noun

2. a form of Mexican Spanish having elements of English and spoken near the border of Texas and Mexico, especially Mexican Spanish as spoken in Texas.
3. Music. norteña.

adjective

1. of, relating to, or denoting the Texan version of something Mexican, such as music, food, or language

adj.by 1914, from Texas + Mexico. An earlier noun for “Texan of Mexican background” was Texican (1863).