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1.
the inventor of The Middle Finger Dance.
A: dude, do you know whos the inventor of the middle finger dance?

B: everyone knows that. its sooyeon.
by monkeydonkey November 25, 2010
 
2.
the origin of beauty and awesomeness also used to describe an amazing woman
Damn girl, you are soo-yeon today!
by ap737 October 19, 2010