Somebody who has gone through years of difficult and strenuous education in engineering, architecture, or a similar field only to wind up with a mindless and repetitive job where they do one task on a computer drafting program over and over again.

See: tool.
My cousin Curtis talked up the benefits of going into engineering, and now spends 12 hours a day sitting at a computer using a software program to draft diagrams of screws for heavy machinery. He is a CAD monkey.
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