In the previous line he sets up this gibberish reference by describing his lyrics as coming at you as "Supersonic" speed. Then he underlines it with a "JJ Fad!" punch-in. It's a reference to '80s electro-rap group JJ Fad, whose debut was produced by DJ Yella, Arabian Prince, and Dr. Dre. The "sama lamaa duma lamaa" gibberish section is a lift from the "Supersonic (Remix)."
"Sama lamaa duma lamaa."
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