mul·lock I. \ˈmələk, ˈmu̇l-\noun (-s) Etymology: Middle English mullok, from mul, mol dust, dry mold — more at mull 1.chiefly dialect Britain: rubbish, refuse, dirt 2.dialect: a state of confusion : muddle, mess 3.Australia a.: refuse earth or rock from a mine b.: earth or rock bearing no gold II. verb (-ed/-ing/-s) intransitive verb dialect Britain: to work in a slipshod way transitive verb dialect Britain: mess, waste, spoil