The photo shows a Turkish restaurant with a sign that says "YARRAK DÖNER". "YARRAK" is a vulgar word in Turkish and "DÖNER" is a Turkish dish made from meat roasted on a vertical spit. The joke is that the restaurant is using a vulgar word to make their sign more attention-grabbing and humorous. The word "yarrak" is considered offensive in Turkish culture, so the joke plays on the contrast between the offensive word and the seemingly innocuous food item. This type of humor is often used in Turkish culture to shock or provoke a reaction. However, it's important to note that this type of language may be considered offensive and inappropriate in many other cultures.