'Scum' in the Bible

Like a [common] clay vessel covered with the silver dross [making it appear silver when it has no real value]Are burning lips [murmuring manipulative words] and a wicked heart.

Your silver has become scum, your beer is diluted with water.

You have reduced us to scum and garbage among the nations.

“Son of man, the house of Israel has become dross (metallic waste) to Me. All of them are (useless) bronze, tin, iron, and lead in the furnace; they are the dross of silver.

Therefore, thus says the Lord God, ‘Because you have all become dross, therefore, behold, I will gather you [O Israel] into the midst of Jerusalem.

Wherefore thus saith the Lord GOD; Woe to the bloody city, to the pot whose scum is therein, and whose scum is not gone out of it! bring it out piece by piece; let no lot fall upon it.

Then set it empty upon the coals thereof, that the brass of it may be hot, and may burn, and that the filthiness of it may be molten in it, that the scum of it may be consumed.

She hath wearied herself with lies, and her great scum went not forth out of her: her scum shall be in the fire.

When slandered, we answer with kind words. Even now we have become the filth of the world, the scum of the universe.