It's pretty much a saying used by the best comic genius ever

Napoleon Dynamite
"This one tastes like it got into a field of cabbages."
"Correct"
"Yessss!"
by Rebecca Hannam September 25, 2006
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Used to express ultimate approval and excitement over something (often accompanied by a HIGH-FIVE).
Boy 1: Dude I just got my first skateboard.

Boy 2: FUCKING YESSS *high 5*
by Hannah-Montana March 28, 2012
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