Biang Biang noodles are a type of Chinese noodle that is known for its thick and wide hand-pulled shape. It originated from the Shaanxi province of China and is typically served with a spicy and savory sauce, and topped with various ingredients such as vegetables, meat, and chili oil. The name "Biang Biang" refers to the sound that the dough makes when it is slapped on the kitchen counter while being hand-pulled. It is a popular dish in China and is gaining popularity in other parts of the world.