1. Scum of the earth.

2. It's open to the scum of the earth.

3. You are lower than the scum of the earth.

4. As far as Creste goes, he is the scum of the earth

5. On the contrary, I think the titled aristocracy are the scum of the Earth.

6. Incidents occurred between brash foreigners, qualified as "the scum of the earth" by a contemporary diplomat, and the Japanese.