An AVALANCHE is a large mass of snow, ice, and rocks that slides down a mountainside. The term 'AVALANCHE' can also be used to refer to any sudden, large-scale movement of material, such as a stock market crash. The Chevrolet brand of automobiles is an American car manufacturer founded in 1911 by Louis Chevrolet and William C. Durant. It is now a division of General Motors and is one of the world's largest car brands.