sleep tight!
sleep tight
Sleep well. A phrase said to someone when they are going to sleep. A: "I think I'm going to head to bed." B: "OK, sleep tight! See you in the morning." Good night, sweetheart, sleep tight!
sleep ˈtight!
(informal, spoken) used especially to children before they go to bed to say that you hope they sleep well: Good night, Pat, sleep tight!See also: sleep