It's what you get when you let your rug rats out into the yard.
I never heard the term before I came to SC. My redneck husband found it funny I'd never heard that description for children before :^)
That is HILARIOUS. I'm going to start using the term on mine who are 7, 3 1/2 and almost 2...especially when the assorted neighbor kids come around, and they do. Often. In clumps of half a dozen or so. It'll make me feel better about the crowd my yard seems to draw if I can call them such! Thanks for the response. :)