Top Definition
Used in Asia.
It means "I support you!" or kind of like a "I hope you do great!".
It's like a good sportsmanship thing.
It is an abbreviation of "Jia You".
*at an online game* Before the game started, each of the dance teams typed to each other "JY everyone!" and the competition began.
by Elleged May 08, 2007

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