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1.
The process by which a female descends along a male shaft for long hours of hard labour. The process often occurs in darkness and can bring sweat to the skin.

On several occasions in the 19th century females were described as mining so much that a baby boom was in full flow. At the end of the 20th century it became legal to mine without a hard hat. Some often describe the process as a slag tipping it, noticeable figures that would mine up to 10 shafts a night and soon became encompassed with the catchphrase 'Mining? Whatcha say?'
Corrr Jenny, the way she does her mining, shes the Maggie Thatcher anti-christ.
by crash into a van July 27, 2010
 
2.
A skill in the worldwide known game, Runescape. It has been known to cause suicide and/or brain trama, being as long and tedious as it is. Respect anyone who has the highest level.
Person 1: That Nick kid is going for 99 Mining in Runescape. Person 2: Holy shit I hope he lives.
by Runescape User July 16, 2009
 
3.
Offer own hardware for distributed calculations for crypto coins as revenue.
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The primary purpose of mining is to allow Bitcoin nodes to reach a secure, tamper-resistant consensus. Mining is also the mechanism used to introduce Bitcoins into the system: Miners are paid any transaction fees as well as a "subsidy" of newly created coins.
Are you looking to get into new cryptocurrency mining equipment as early as possible?
by kostja_m December 30, 2013