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sleep through something
to remain sleeping through some event. I didn't hear the storm. I guess I slept through it. Wally slept through the entire opera—even the loud part.
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.