And why you complain
When you niggas is past poor, you'll never hop in my lane
Pass poor is a play on words from “passport” mentioned a few lines before. Kendrick is surpassing the competition as he’s accelerating because the other rappers' past is weak. The “past poor” might mean lacking in experience or poor in the sense of having less than him.
“When you niggas is past poor” is also a reference to his earlier metaphors dealing with how far ahead he is. In this sense he’s using “Past” as time. As in he’s no longer poor like they are because he’s fast forwarding ahead of them or he’s the future.
“You’ll never hop in my lane when you pushin' a RAV4” is a metaphor for Kendrick leading the pack, if you wanna “drive in his lane” you have to step it up or you’ll just get passed up.
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