mullock

UK: /ˈmʌlək/ US: (mul′ək)

WordReference Random House Unabridged Dictionary of American English © 2026

mul•lock  (mul′ək), n. 

1. British Terms (in Australasia) refuse or rubbish, as rock or earth, from a mine;
   muck.
2. British Terms poke mullock at, [Australian.] to ridicule.

• 1350–1400; origin, originally dialect, dialectal English; Middle English mullok, equivalent. to mul dust, mold, rubbish (compare Old English myl dust; vowel perh. from Middle English mullen; see mull⁴) + -ok -ock

mul′lock•y, adj. 

Collins Concise English Dictionary © HarperCollins Publishers::

mullock / ˈmʌlək/ noun

1. waste material from a mine
2. poke mullock at ⇒ to ridicule

Etymology: 14th Century: related to Old English myl dust, Old Norse mylja to crush; see muller