In Norse mythology , Sleipnir ( Old Norse `` slippy '' or `` the slipper '' ) is an eight-legged horse . In both sources , Sleipnir is Odin 's steed , is the child of Loki and Svaðilfari , is described as the best of all horses , and is sometimes ridden to the location of Hel .
There is a horse called Sleipnir.