gulleywasher 

A heavy rain, a storm

Wow that storm was a gulleywasher.

gulleywasher by Scarlett Nicole July 3, 2007

Gullywasher 

Chiefly Southern term for a heavy rainstorm.

They say the rain's movin' in, from the looks of it I'd say it's gonna be a real gullywasher

Gullywasher by Hooter Stumpfuck II February 4, 2007

Gullywasher 

A shit storm.

Billy done told us about that damn gullywasher coming boys. Y’all get ready for that damn rain fall.

You don’t know what a gullywasher is, you must not be country enough.

Gullywasher by Will blackcock March 16, 2023