Do you know what a "gullywasher" is?

Spring rains reminds me of a saying, "it came a gully washer." Being from the South, this phrase comes naturally for me to say, yet I forget, there are those who have no idea what I am saying or what it means.
A "gully washer" is a Southern term for a extremely heavy rainfall that causes ditches or "gullies" to overflow, creating flash floods, a washing out of small gullies in freshly plowed ground, a gush of water.
So the next time you hear a flash flood warning over the weather radio, you can say, "They say the rain's movin' in, from the looks of it, I'd say it's gonna be a real gullywasher"  Enjoy!