take someone's name in vain

take someone's name in vain idiom
Speak casually or idly of someone, as in There he goes, taking my name in vain again. This idiom originated as a translation from the Latin of the Vulgate Bible (Exodus 20:7), “to take God's name in vain,” and for a time was used only to denote blasphemy and profanity. In the early 1700s it began to be used more loosely as well.

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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Bernie

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The phrase could be read as "take my name for your own vanity"; to use someone else's accomplishments to enhance your own reputation.

Posted by Bernie 83 days ago.

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