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
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...
What do you call a segment of an orange? These juicy pieces of fruit go by lots of different names, including section, wedge, and carpel. But they’re also called pegs or even pigs! The stringy parts of a banana also have a surprising name...