A snowstorm with particularly wet and heavy conditions, likely to lead to heavy accumulation, as well as massive ice patches. So named because, if there is a god causing the weather, this is him taking an angry, angry shit on your city.
1. "No way I'm going to lab! It's snowshitting like all hell out there!"
2. "We were going to go out to the movies, but stayed home instead to avoid the snowshit."