mullock

Etymology
From.

Noun

 * 1)  Rubbish, waste matter.
 * 2)  Mining waste or ore processing waste:
 * 3)  Overburden: waste material generated while searching for minerals or while mining, such as when sinking a shaft.
 * 4)  Tailings: waste rock from which the wanted gold, minerals, opal, etc., has been extracted.
 * 5) * 1875, New Zealand House of Representatives, Appendix to the Journals of the House of Representatives of New Zealand, Volume 2, |%22mullocks%22+-intitle:%22%22+-inauthor:%22%22&dq=%22mullock%22|%22mullocks%22+-intitle:%22%22+-inauthor:%22%22&hl=en&sa=X&ei=Rku2T-SwKqXBiQf27_X3CA&redir_esc=y page 30,
 * The gold, both in the quartz and mullock, is very fine, and, owing to the soft and ferruginous nature of the stuff, specks can but very rarely be seen during working.
 * 1) Nonsense, rubbish.
 * 2)  A mess; the result of a blunder.
 * 1) Nonsense, rubbish.
 * 2)  A mess; the result of a blunder.
 * 1)  A mess; the result of a blunder.

Verb

 * 1)  To clear waste material out of a mine.