mullockPronunciation: /ˈmʌlək/Definition of mullock noun [mass noun] dialect worthless material; rubbish. Australian/NZ rock which contains no gold or from which gold has been extracted. Australian/NZ worthless information; nonsense. Phrases poke mullock at Australian/NZ informal ridicule (someone). Origin: late Middle English: diminutive of earlier mul 'dust, rubbish', from Middle Dutch
