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The 24 Hour Flu is the debilitating after effects of drinking too much liquor. It is called the 24 hour flu because you feel as if you have the stomach flu, except without the 2 week duration of the actual virus. Common causes of the 24 hour flu are lemon parties (not to be confused with the shock pic), vodka, whiskey, Jagermeister, rum, everclear, tequila or any other hard liquor. It is the most common cause of missing employees on monday because of hard partying over the weekend.
Employee: Boss, I can't come into work today.
Boss: Why not?
Employee: I have the 24 hour flu, I should be back on Tuesday.
Boss: Okay, I understand, get a lot of rest and drink a lot of fluids.
Employee: Thanks man. *Barf*
by Cinderella_Man October 21, 2010
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