An occupation: Any person from Massachusetts, typically, that harvests clams at low tide in the clam laden inlets.
An article of clothing: Pants that are worn by those digging clams. They are cut off 6 inches below the knee and resemble "High Waters" but have no apparent cuff or taper.
1: It's low tide, let's take a ride by the inlet and see if the Clam Diggers are out.
2: Dude, why the fuck are you wearing Clam Diggers? We're goin to pick up the ladies, not the beach.