gullywasher

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

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noun Chiefly Midland and Western U.S.

a usually short, heavy rainstorm.

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Origin of gullywasher

First recorded in 1815–25; gully¹ + washer

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