1. To fill in those awkward awkward silences
2. To express happiness
3. Another word for "snap!"
4. A great word to say when drunk/high/generally smashed.
Could possibly be a verb...
"What the hell does shming mean?"
"Who cares. Shming!"
a collection of unwanted matter anywhere unwanted matter can be found.
Dude, you've got some shming on your lip.