n. someone who is obsessed with work. : Jerry is a workaholic. He can't enjoy a vacation.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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1968, coined from work (n.) with second element abstracted absurdly from alcoholic, setting up the Rodney Dangerfield joke, "My old man was a workaholic: every time he thought about work, he got drunk."