The Collaborative International Dictionary of English v.0.48:

Gulch \Gulch\, n.
   1. Act of gulching or gulping. [Obs.]
      [1913 Webster]

   2. A glutton. [Obs.] --B. Jonson.
      [1913 Webster]

   3. A ravine, or part of the deep bed of a torrent when dry; a
      gully.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Gulch \Gulch\, v. t. [OE. gulchen; cf. dial. Sw. g["o]lka to
   gulch, D. gulzig greedy, or E. gulp.]
   To swallow greedily; to gulp down. [Obs.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

gulch
    n 1: a narrow gorge with a stream running through it [syn:
         gulch, flume]