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
High school students in Alabama share some favorite slang terms. If someone tells you to touch grass, they’re telling you to get a reality check — but the last thing you’d actually want to touch is dog water! Also, the history of the word hangover...
When does late at night change to early in the morning? 2:30 a.m.? 3:00 a.m.? Another time? This is part of a complete episode. Transcript of “When Does Late Night Become Early Morn?” Listener Greg Johnson asked a question that I’ve been pondering...