What is Salt Miner?
1.
A male person who pleasures himself a bit too often or at opportune moments (like when a girlfriend is asleep or in the bath), a wanker, tosser, masturbator. Taken from the action of a miner using his tool at the source of the salt.
OMFG, did ya hear that Steve got caught wanking at work, he's such a fucking salt miner.