Simply put, a machinist uses tools to make other tools. Some machine tools used are the milling machine, lathe, surface grinder, CNC mill and CNC turning centres, among others.

A machinist cuts, drills, taps, reams, bores, mills, turns, deburrs, files, grinds, programs, and assembles metals, plastics, wood, and any number of exotic materials used in consumer goods, automotive, aerospace, and medical areas of industry.

Machinists--unlike machine operators--are skilled tradesmen. They are required to have a solid background in problem-solving skills using technical math, metrology (measurement), as well as CNC programming (Mastercam, Solidworks, etc.) editing, and operation.
by not_on_the_dole_guy December 11, 2006
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A writer of limited talent who weaves a myriad of complex plot lines into the beginning of his work, only to later abandon most of those plot lines in a lazy ‘deus ex machina’ story ending.
Did you watch the ending of ‘Battlestar Galactica’? There was a really douche ex machinist at work on that final episode!
by AuntyMouse April 11, 2009
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penis machinist is Navy slang for a corpsman. also called pecker checker or chancre mechanic.
The penis machinist said I don't have the clap.
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