sleep like a rock(redirected from they have slept like rocks)
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sleep like a rock
To experience a very deep and restful sleep; to sleep soundly. I can't believe you finished a triathlon! You're going to sleep like a rock tonight. I have to set numerous alarms for the morning because I sleep like a rock every night!
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.
sleep like alog/rock
To sleep very deeply.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.