The Collaborative International Dictionary of English v.0.48:

Stot \Stot\ (st[o^]t), n. [AS. stotte a hack, jade, or worthless
   horse; cf. Sw. stut a bull, Dan. stud an ox. Cf. Stoat.]
   1. A horse. [Obs.] --Chaucer. Thorold Rogers.
      [1913 Webster]

   2. A young bull or ox, especially one three years old. [Prov.
      Eng. & Scot.]
      [1913 Webster]