Definition: [noun] Rubbish, waste matter.
Definition: [noun] Waste rock from which the wanted gold, minerals, opal, etc., has been extracted; waste material generated while searching for minerals or while mining, such as when sinking a shaft.
Definition: [noun] Nonsense, rubbish.
Definition: [noun] A mess; the result of a blunder.
Definition: [verb] To clear waste material out of a mine.