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The American Heritage Dictionary of Idioms » turn tail
turn tail
turn tail idiom
Run away, as in When they heard the sirens, the boys turned tail. This term alludes to an animal's turning its back in flight. [Mid-1500s]
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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