catch forty winks and take forty winks; have forty winks
Fig. to take a nap; to get some sleep. I'll just catch forty winks before getting ready for the party. I think I'll go to bed and take forty winks. See you in the morning.
forty winks
Fig. a nap; some sleep. I could use forty winks before I have to get to work. I need forty winks before I get started again.