digger
noun
[ ˈdɪɡə ]
• a person, animal, or large machine that digs earth.
• a member of a group of radical dissenters formed in England in 1649 as an offshoot of the Levellers, believing in a form of agrarian communism in which common land would be made available to the poor.
• a man, especially a private soldier (often used as a friendly form of address).
• "how are you, Digger?"