hole up

hole up idiom
Take refuge or shelter, hide, as in I spent most of the cruise holed up in my cabin. This usage alludes to animals hibernating in winter or hiding from attack in caves or holes. [Late 1800s]

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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