gullywasher

[guhl-ee-wosh-er, -waw-sher]

noun Chiefly Midland and Western U.S.

a usually short, heavy rainstorm.

Origin of gullywasher

First recorded in 1815–25; gully¹ + washer

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018