In Norse mythology, the world was created from the body of the primordial being Ymir.
Ymir was the first giant, or jötunn, formed when heat from Muspell met the ice and poisonous rivers flowing from Niflheim across Ginnungagap. In the Prose Edda, a primeval cow named Auðumbla nourished him with milk. Ymir became the ancestor of the jötnar, while Auðumbla uncovered Búri, the forefather of the gods, by licking salty ice.
Ymir was eventually killed by Odin and his brothers Vili and Vé. They used his corpse as the raw material for the cosmos: his flesh became the earth, his blood the seas, his bones the mountains, his skull the sky, and his hair the trees. His eyebrows formed the enclosure of Midgard, the human world, while his brains became clouds.
This story does not mean Ymir was a creator god. He is a primordial being whose death enables cosmic order. Odin, Vili and Vé shape the world from him, while other creation episodes explain the origins of the sun, stars, dwarfs and the first humans, Ask and Embla.