"What the track say" (Eminem – Fly Away) | rejected

Also, track means his ass crack, a continuation of the first part of the line.

"Yeah boy, them better ring the alarm, boy / Them know wha..." (Eminem – Drop the Bomb on 'Em) | rejected

Also, the first ‘boy’ word is followed by 37 more in the song. Wow.

""What was that? Oh, Jermaine Dupri / Fuck it," Keep goin'..." (Eminem – Canibitch) | accepted

A joke on Canadian distances; only 30.000 more miles means you’re close in a Canadian sense.

"Saddam and Osama Bin" (Bad Meets Evil – Welcome 2 Hell) | rejected

One thing for sure, all 4 of these dudes are in Hell now.

"Said fuck it with a capital I, look who’s back to antag-g..." (Bad Meets Evil – Loud Noises) | accepted

K_W is right the official lyrics say “antag-g-onize” — it might be a sheer coincidence but it sounds like two words combined (antagonize and agonize) — but maybe it’s just stretched for the rhyme

"Her bottom's dark, but her top is tan," (Bad Meets Evil – A Kiss) | rejected

Could be a double entendre: “her top is ten” meaning it’s perfect while tan means brown.
See also We Made You http://rapgenius.com/18771

"We can smoke 'til there's no more lighter fluid to do it" (Eminem – Old Time's Sake) | accepted

He suggests he won’t run out of weed, it’s more likely for the lighter fluid to go off.

"I bear more arms than 6 koalas" (Eminem – Session One) | rejected

Koalas are bears and 6 of them have at least 12 arms — wordplay, wordplay.

"Call me Brett Favre, spell it F-A-V-R-E, yup / It’s wrong..." (Bad Meets Evil – I'm on Everything) | accepted

So the lyrics should be corrected to: ‘ Call me Brett Favre’

"Why you tryna keep convincing me for" (Bad Meets Evil – A Kiss) | accepted

George’s right, I too commented that here, somehow mine got deleted.