Fuzzy is the feeling after a night of drinking the next morning. It can best be described as knowing you're not hung over, but still not feeling quite 100%.
Extra long showers usually help somewhat, but nothing but time will cure your uneasiness.
If you think of a "buzz" as a pre-drunk state, being fuzzy is the post-drunk state. The outlying cause is the alcohol still being worked out of your system long after you've awaken, one molecule at a time.
*in class the next morning*
kid1: "Dude I'm mad fuzzy."
kid2: "Me too."
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