Can occur on a Sunday evening bust most often Monday through Thursday. Caused by the excess consumption of alcholic beverages the previous evening, resulting in a craptastic
hangover the following morning, most certainly resulting in a "sick" call into the office.
Dude, what happened to you yesterday, I didn't see you in the office, are you OK?
I got so shitfaced
the other night that I had to call in sick this morning on account of the Beer Flu.