What that nigga, what's that Jeezy song say nigga?
"Last time I checked I was the man on these streets!"
Yea, yea, that shit right there. I'm tryna be the nigga in the street

from Kendrick Lamar – The Art of Peer Pressure Lyrics on Rap Genius

Meaning

The line being referred to here is from Young Jeezy’s song “Trap or Die” on the aforementioned album Let’s Get It: Thug Motivation 101.

http://www.youtube.com/watch?v=28_0er6e82c

These lines lead directly into the theme of the following song, Money Trees

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