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.
by C.A. Stallworth April 6, 2006
Get the Beer Flu mug.
When you wake up the next morning after a heavy night of drinking, unable to go to work you phone and call in “sick”
John phoned in sick today, but I recon he has a case of beer flue.
by Linus Hanger May 26, 2006
Get the Beer Flu mug.
Simply another way of saying the corona virus, because there is a beer called corona
Usually used in dark situations involving COVID to try and lighten the mood
Person 1: man I just got COVID, I'm fucked
Person 2: you mean spooky beer flu?
Person 3: what the hell are you talking about?
by Ageddevistation August 19, 2022
Get the Spooky beer flu mug.
The discreet way of saying that you have/had COVID-19
YouTubers refer to COVID-19 as The Beer Flu
by JonSturtz23 April 2, 2022
Get the Beer Flu mug.