Monday jetlag

Monday jetlag
 n.— «“It would be normal for a lot of teenagers to stay up late and get up late,” said Dr. Jeffrey Cohen. Dr. Cohen with the sleep lab at St. Bernards said this is what doctors refer to as “Monday jetlag.”…Sleeping in on the weekends can “re-set’” your body clock causing you to have a jet-lagged feeling on Monday morning.  This feeling can last one to three days.» —“Not Getting Enough Sleep Can Cause ‘Monday Jet lag’” by Brandi Hodges KAIT-TV (Jonesboro, Arkansas) June 20, 2007. (source: Double-Tongued Dictionary)