gullywasher: Meaning and Definition of

gul•ly•wash•er

Pronunciation: (gul'ē wosh"ur, -wô"shur), [key]
— n. Chiefly Midland and Western U.S.
  1. a usually short, heavy rainstorm.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.