The term 'ethnic fast food order' can be summarized as a type of food that is typically associated with a particular culture or region. The crossword solution for this term is 'gyro, ' which is a Greek dish consisting of meat cooked on a vertical rotisserie and served in a pita bread with tomato, onion, and tzatziki sauce. Gyros are popular around the world and have become a staple of many fast food restaurants.