Rubbish, waste matter.
Tailings: waste rock from which the wanted gold, minerals, opal, etc., has been extracted.
Nonsense, rubbish.
A mess; the result of a blunder.
Overburden: waste material generated while searching for minerals or while mining, such as when sinking a shaft.
To clear waste material out of a mine.
That which sullies or defiles.
Silt or sediment deposited from flowing water.
The scoria on the surface of molten metal in the ladle.
The liquid discharges from kitchens, washbasins, toilets etc; sewage.