double up

double up idiom
  1. Bend over suddenly, as in pain or laughter. For example, She doubled up with a cramp. [Late 1800s]
  2. Share accommodations meant for one person, as in The hotel ran out of rooms, so we had to double up. [Late 1700s]

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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