Gul·ly, n.; pl. Gullies
  1. A channel or hollow worn in the earth by a current of water; a short deep portion of a torrent's bed when dry.
  2. A grooved iron rail or tram plate. [Eng.]
  Gully gut, a glutton. [Obs.] --Chapman.
  Gully hole, the opening through which gutters discharge surface water.