Anyone who is a fast thinker and can think of possibly anything rather quickly, most preferably jokes, etc.

Can also be dumb.
"He blows my mind!"

"Wow, I love how your mind works! You must be a Yufan!"
by Strange Man February 25, 2008
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A syndrome similar to the marfan syndrome, however more deadly. You will be able to eat nothing but fish rice, and forced to eat fish rice for the rest of your life.
Why does he smell so bad?" "He has yufan syndrome so he smells like fish.
by qwewy February 12, 2011
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