Today, fajitas can be filled with grilled chicken, shrimp, and even vegetables, because the more popular the dish became, the less likely it was to be made with skirt steak. Typical condiments include ingredients such as lettuce, sour cream, cheese, tomatoes, or guacamole.
Fajitas is a popular Tex-Mex dish made from marinated, grilled skirt steak that is served in a wheat flour tortilla. The earliest printed mention of the word fajita referring to food appeared in 1975, and ten years later it had become one of the most popular dishes of Tex-Mex cuisine.
The word fajita is derived from the Spanish faja, meaning girdle or strip, referring to a cheap cut of beef covering the diaphragm that was considered somewhat undesirable by many locals. In the 1940s, Mexican ranch workers used to tenderize the skirt steak by pounding and marinating it in lime juice before cooking it over an open fire and serving the meat in a wheat tortilla along with numerous condiments.