sleep hangover
n.— «Those medications can induce next-day grogginess—what some patients call “sleep hangovers.”» —“10 Ways to Get Better Sleep (and Maybe Cure Your Insomnia)” by Lindsay Lyon US News & World Report Mar. 3, 2009. (source: Double-Tongued Dictionary)
Further reading
An old Irish curse goes: May the devil make a ladder of your backbones while picking apples in the garden of hell. If you’d rather offer someone a friendlier wish, try May angels bless your sleep with the smell of apple pies. This is part of a...
A French idiom that means “to sleep in” or “lie around lazily in bed after waking” is faire la grasse matinée, literally to “make the fat morning.” If you fall in love easily, you’re said to have un coeur...