What is Sinfluenza?
1.
The debilitating condition suffered for approximately 1 to 3 business days after a wild weekend in Las Vegas, New York City, or another recognized center of partying and nightlife.
I called in sick to work because I spent the weekend in Vegas and I came down with a case of Sinfluenza.
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when someone is agreeing with what someone else is saying. Also could be used in the beginning of a sentence if the person talking is e..