Sphinx burger
Contrary to conventional thought, a Sphinx burger is not actually a burger at all. It can be purchased from the restaurant Sphinx in 
11 Gdańsk (and other similar establishments throughout Poland) and comes in chicken, pork or vegetarian variety. It is made up of a large bread roll stuffed full of chopped bits of meat (or vegetables), topped with lots of salad and rather grim sauce which makes it nigh on impossible to battle through to the few decent bits of meat at the bottom. It is, quite simply, disgusting.