Grubber was a colloquial name for a new, inexperienced miner in the worker culture of the Orpheus Mining Colony on Luna.

In 2155, upon seeing Trip Tucker with a S-K model, Josiah asked him if he was "fresh off the boat". After seeing Trip's reaction, he explained how he knew - the S-K Model was only ever given to grubbers. (ENT: "Demons")

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