sleep through

sleep through idiom
  1. Sleep without waking for a period of time, usually the night, as in At three months many babies have learned to sleep through. [Mid-1900s]
  2. sleep through something. Fail to pay attention, as in We all slept through the explanation and then had trouble getting the machines started.

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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