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The feeling you get the morning or day after your football team lost their match. Usually consists of feeling like crap all day and being quite arrogant towards others.
Oh man, The Colts lost to the Pats yesterday, I have the worst NFL Hangover.

Jesse: Why is Brent being such a douche today?
Cam: The Seahawks lost, he has an NFL Hangover...
by Shane Danbert... December 29, 2007
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