When you have so much sex and get so worn out from it that your bodies internal clock becomes messed up and you feel tired all the time.
by Chris Pryer December 30, 2006
Get the sex-lagmug. That two-three day lag which one exeriences after a long weekend of debaucherous sex. Generally it takes a couple of sleeps and a long shower or two to get over it. One of the grimiest ways you can ever feel. Spent.
"I'm sorry Joe, can't come out tonight due to extreme sex lag, need to get some sleep real bad or my brain won't turn on again".
by Diva D January 21, 2006
Get the sex lagmug.