get (one's) beauty sleep
To get sleep that helps one to look refreshed and attractive. Usually said humorously. Can you guys be quiet down there? I'm trying to get my beauty sleep! You look tired, Joe. What's the matter, didn't get your beauty sleep last night?
get your ˈbeauty sleep
(humorous) go to bed early so that you wake up feeling healthy and looking attractive: Look how late it is! I won’t get my beauty sleep tonight.