Hamburger "patty" is rarely used, or the term can even refer simply to ground beef. The term may be prefixed with the type of meat or meat substitute used, as in "turkey burger", "bison burger", or "veggie burger". Hamburgers are sold at fast-food restaurants, diners, and specialty and high-end restaurants (where burgers may sell for several times the cost of a fast-food burger, but may be one of the cheaper options on the menu). There are many international and regional variations of the hamburger. The term "hamburger" originally derives from Hamburg, Germany's second-largest city. In German, "Burg" means "castle", "fortified settlement"
Hamburger burger uses ground venison from deer. A "veggie burger", "black bean burger", "garden burger", or "tofu burger" uses a meat analogue, a meat substitute such as tofu, TVP, seitan (wheat gluten), quorn, beans, grains or an assortment of vegetables, ground up and mashed into patties. A steak burger is marketing term for a hamburger claimed to be of superior quality. or, in Australia, a sandwich containing a steak. Steak burgers are first mentioned in the 1920s. Like other hamburgers, they may be prepared with various accompaniments and toppings. Use of the term "steakburger" dates to the 1920s in the United