Flaki

Flaki or flaczki is a traditional Polish tripe stew. It is one of the many Polish soups, which represent an important part of Polish cuisine. Along with bigos, żurek, and pierogi, it is one of the most notable specialities in Polish cuisine. Its name is derived from its main ingredient: thin, cleaned strips of pork tripe . The Polish name flaki, literally meaning "guts" being the plural of flak ("guts"), came from German Fleck ("spot"), from Middle High German vlëc Old High German flec/flek, from Proto-Germanic *flekka- ("spot/mark"). Flaczki, the diminutive of flaki, is also used to refer to tripe soups in Poland. Croatian fileki is a cognate. German names for tripe soups include Kuttelsuppe and Flecksuppe ("tripe soup"), as well as Saure Kutteln and Saure Flecke ("sour tripes"), as the words Kuttel, Fleck, and Kuttelfleck can all mean "tripe". Flaki has been consumed on Polish territory since at least the 14th century. It is known to have been one of the favorite dishes of King Władysław II Jagiełło.

Source: Wikipedia