B.o.B – High | rejected

When he says “It ain’t much to say when actions speak for themselves
So just the fact that I’m in this motherfucker means I’m ballin'” that means that he doesn’t need to say anything since actions speak louder than words. Rather than hearing him brag, see what he’s done.
Also, when he says “You just ain’t hit the concrete yet nigga, you stalling” that means that instead of falling of the top, you decide to try and drag it on and milk it for all it’s worth. It’s a metaphor for fame and losing it.
Finally, in “Spanish girls only, we can skip the foreplay” he actually says “Ole'” not “Only”.

Royce Da 5'9" – Second Place | rejected

In the interlude “Why that nigga gotta bring Em name up all the time?
You wouldn’t even be rich without that nigga! Shut up faggot!” he’s talking about how he likes to bring up Eminem a lot now that they are back to being close friends. But, when people hate on the fact that he does that, he doesn’t really care. Hence, the “shut up faggot”.

B.o.B – Strange Clouds | rejected

“Gangstas, Outlawz” is a reference to Tupac’s gangsta rap group, The Outlawz

Royce Da 5'9" – Writer's Block | rejected

He actually said “Keepin' it real on a string”.

Lupe Fiasco – I'm Beamin' | rejected

When he says “You see I hood a lot” he’s talking about where he grew up. The Westside of Chicago in the ghetto.

Lupe Fiasco – Dumb it Down | rejected

When Lupe says “Westside!” this is a reference to where he grew up. The Westside of Chicago.

Eminem – Just Don't Give a Fuck | rejected

“Too many mental problems got me snorting coke and smoking weed again"
When you’re under stress, a lot of people turn to drugs to whisk their problems away.

Eminem – Cinderella Man | rejected

When he says “Guess I’m Lucky” he’s talking about when he almost died. Not many people survive from overdose.

"It's just, Slim Shady and DJ Clue / I ain't evil, I just ..." (DJ Clue – What the Beat) | rejected

Back then Royce and Em had a joint on the Slim Shady LP called “Bad Meets Evil”. They also had a few other songs (Nuttin' to Do/Scary Movies) and “Rock City” on Royce’s album, Rock City. They both decided that Royce had more “bad” lyrics and Em’s lyrics were more “evil”. Hence the EVIL. They now have a full EP/Album (depending on if you get the special edition) together called “Hell: The Sequel”.