I'm Kostya Tszyu, you Zab Judah
Two rounds through ya forget the past I'm the future
This line is a reference to the boxing match between Kostya Tszyu and Zab Judah on November 3th, 2001. Kostya Tszyu knocked out Zab Judah in the 2nd round.
R.A. is saying he’s the winner and you’re only a loser, he can beat you easily.
(For your information, Boxing is his favorite sport)
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