sleep around the clock
To sleep constantly and for very long periods of time. I found myself with no energy, motivation, or desire or anything, wanting to do nothing but sleep around the clock. I think I might be depressed. After his grueling 36-hour journey to get home, Tom spent the next two days sleeping around the clock.
sleep around the clock
to sleep for a full twenty-four hours; to sleep for a very long time. I was so tired I could have slept around the clock. When I got home,I lay down and slept around the clock.