Source : Webster's Revised Unabridged Dictionary (1913)

Scut \Scut\, n. [Cf. Icel. skott a fox's tail. [root] 159.]
   [Obs.]
   The tail of a hare, or of a deer, or other animal whose tail
   is short, sp. when carried erect; hence, sometimes, the
   animal itself. ``He ran like a scut.'' --Skelton.

         How the Indian hare came to have a long tail, wheras
         that part in others attains no higher than a scut.
                                                  --Sir T.
                                                  Browne.

         My doe with the black scut.              --Shak.

Source : WordNet®

scut
     n : a short erect tail