A substance that can gather around private parts, especially in men.
It's not a good thing and it's important to keep clean to avoid it.
Examples:
He needs to wash to get rid of the smegmas.
The doctor said I have too much smegmas.
She doesn't like the smell of smegmas.
The cat's fur looks like smegmas.
If you don't clean, you'll have lots of smegmas.
I don't want to touch the smegmas.