That word supposed to be “Dunn” not Dunm.
Dunn is Dunn lingo for son
Lost Session refers to Royce' 2003 compilation mixtape Build & Destroy: Lost Sessions
Common has used this theme before as well on “I Used to Love H.E.R.
The Lady in the outro is Foxy Brown, this was the time the firm was formed plus she already appeared on 2 other songs on this album
Nas means, since he’s more successful than Cormega, he can build him a fan base just by saying his name
“Had streets locked with raw talent”
is referring to his classic debut Illmatic
Much of Nas' career was supported by Queens' need for another star to win the feud over New York supremacy, and he was a rapper talented enough to defeat foes while representing his borough to the death. In the late ‘80s Bridge Wars, crews from the Bronx and Queens fought over the origins of rap, each claiming that their own neighborhood spawned the art of rhymes before the other. While the situation defused without real incident after the unrelated death of Boogie Down Productions’ Scott La Rock, the legacy of the conflict was permanently cemented within Queens.
Citing the conflict and Boogie Down’s willingness to leave Queens out of the picture of early rap, Nas reminds listeners that Queens was still winning because of its prolific drug dealers, whose habits helped mold hip-hop culture beyond music.