hares

any of a large group of swift mammals (order Lagomorpha) of the same family (Leporidae) as the rabbits, with long ears, soft fur, a cleft upper lip, a short tail, and long, powerful hind legs: it differs from a rabbit in that it is larger, does not burrow, and has furry, active young

Brit., Informal to run fast or go hurriedly: with off, away, about, etc.