That's the product's name. Apparently the Shiok Burger is the evergreen mystery burger. Today it's sour vegetable chicken. Sliced chicken, sour vegetable and chilli. It wasn't impressive. Together with the rougamo bun, it felt like a rougamo. And guess what, we passed their sister restaurant Deli Bowl and saw the same sour vegetable chicken. So maybe their special flavour is always influenced by Deli Bowl.