The Collaborative International Dictionary of English v.0.48:

Wanty \Wan"ty\, n. [For womb tie, that is, belly?and. See
   Womb, and Tie.]
   A surcingle, or strap of leather, used for binding a load
   upon the back of a beast; also, a leather tie; a short wagon
   rope. [Prov. Eng.]
   [1913 Webster]