That stuff that remains days, weeks and perhaps months after a large snow storm. This is the stuff beside the road and/or perhaps at the ends of the mall parking lot.
It appears to be an ice and sludge combination which remains for much too long and an ugly aftermath to what once was a beautiful snowfall.
Also known as icegrime
When the hell is that snodge going to melt?!? Or, oh sh!t, I stepped in that snodge . . . now look at my boots!