The use of the word ‘lamp’ might also be a pun. In the prior line, he describes how kids can be driven by cold (and hunger) to commit crimes; due to his success, Nas no longer suffers from these problems, so perhaps Nas intends to suggest this by evoking imagery of using an oil lamp for warmth.
In this way, “But I'mma lamp” is a counterpoint, his solution to his problems. He can relax because they have been solved, but more importantly, he was the one who solved them.
DJ Ron G is a legendary mixtape DJ who in the early 90’s was making now-classic “blendz” tapes. He claims that he was the true “inventor of the remix” — the first one to “put r&b vocals over hip hop beats”
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A taint is the area between your ballsack and asshole (prevents you from not crushing your balls when sitting). So lady, if you think you’re too mighty to get out with a simple taint, forget about the ballsack (Eminem), you ain’t getting him.
A taint is also a trace of some nasty substance. Play on the “can of paint” context.
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