Hump

Hump Hump (h[u^]mp), n. [Cf. D. homp a lump, LG. hump heap, hill, stump, possibly akin to E. heap. Cf. {Hunch}.] 1. A protuberance; especially, the protuberance formed by a crooked back. [1913 Webster]

2. (Zo["o]l.) A fleshy protuberance on the back of an animal, as a camel or whale. [1913 Webster]

3. (Railroad) a portion of a switchyard with a slanting track in which freight cars may coast without an engine and be sorted through a series of switches. [PJC]