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!

sleep like a

log/rock

To sleep very deeply.

See also: like, sleep

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.

See also:

sleep like a top
sleep like a baby
sleep like a
sleep like a log
sleep like a log/top
sleep like a log/top, to
sleep like a lamb
sleep tight
sleep tight!
deep sleep

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