Translation of "Chaff" in Japanese

You really are the chaff of humanity.

ほんとお前人間のクズだな。

The boss said this group is a real mixed bag. I wonder if he places me with the wheat or the chaff.

ボスには玉石混交のグループとは言われたけれど、俺は玉かな、それとも石なのかな。