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all work and no play (makes Jack a dull boy)

Hard work without time for recreation is not good for one's health, as in If Harry keeps up that grueling schedule, he's headed for a breakdown—all work and no play isn't healthy. A proverb included in James Howell's collection of 1659, this phrase remains so familiar that it is often shortened, as in the example.

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The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.