I told these stupid hoes when I come back I’mma set this bitch on fire!
And this time I don't mean I'mma pour gasoline on some chick and light her
“Set this bitch on fire” is a common idiom for getting the place absolutely out of control — but Eminem no longer means this metaphorically, he is literally going to get some gasoline and set the rap game on fire (which will probably also get the place out of control)
He is saying that he is gonna shut the place down and not metaphorically but literally. the line “And this time I don’t mean ima pour gasoline on some chick and light her” is referring to Love The Way You Lie where he then says “….ima tie her to the bed and set this house on fire” http://rapgenius.com/18438
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