when you absolutely yam berf on someone when throwin down the rock aka you dunk on someones face playin ball.
(After PJ Brown dunks on Pau Gasol in Game 4 of the NBA 2008 Finals)
Observer: YOOOOOO check the YAMSTEEZ!
Observer: YOOOOOO check the YAMSTEEZ!
by Johnson Gettung June 12, 2008
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