1
Wanda had bad teeth-yellow ,witha sort of scum over them.
2
If there is a scum over the beverage, beat well.
3
Before they shut they look as if there was a white milky scum over them.
4
They had bad teeth, for the most part, with a scum over them; over-fond of coffee; and were rather dull company.
5
He looked up at the sky, which was scumming over with clouds.
6
The sky had scummed over with clouds.