From Longman Dictionary of Contemporary Englishdiggerdig‧ger /ˈdɪɡə $ -ər/ noun [countable] 
TBCa large machine that digs and moves earth → gold digger
TBCa large machine that digs and moves earth → gold diggerExamples from the Corpus
digger• A J-C-B digger was brought in, but it still took more than three hours to clear up the mess.• When he retired in 1971 his manager, Mr Barrett said that he was the best digger driver they had ever had.• a clam digger• He worked as a ditch digger.• Rotary cultivator A powered digger to break up ground.• All rocks would need to be bedded on the filter plates to prevent undermining, as Uaru are prodigious diggers when spawning.• Today we will concentrate on the inside hook, the digger.• The digger, which was parked at the house after being repaired, was dumped 350 yards away.• But first they must catch you, digger, listener, runner, prince with the swift warning. 