wait up

wait up idiom
  1. Postpone going to bed in anticipation of someone or something, as in My parents always wait up until I get home, no matter how late it is. [Mid-1800s]
  2. Stop or pause so that another can catch up, as in Let's wait up for the stragglers, or Don't walk so fast; wait up for me. [Colloquial]

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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