"Don't make him catch a seizure" (King Geedorah – The Fine Print) | rejected

Caligula, a Roman Caesar from the first century A.D., was known for both his extravagant cruelty and his occasional epileptic episodes.

"Render unto Geedorah what is Geedorah's" (King Geedorah – The Fine Print) | accepted

Actually it is Christ who says “render unto Caesar that which is Caesar’s” — he was asked if the Jews should pay taxes to the Roman emperor, and pointed out that since Caesar’s face was on the coinage, it was only right that money be given “back” to Caesar. The phrase has been, since then, a shorthand for kingly prerogative.

"We found a superfreak, no, she won’t know what hit her" (Pusha T – Lost in the World (Remix)) | accepted

Definitely a reference to the Rick James character played by Dave Chappelle slapping Charlie Murphy after asking him “what did the five fingers say to the face?”

"Tippin' scales / Let alone the pre-orders that's counted ..." (MF Doom – Beef Rapp) | accepted

The “tippin scales” ties into the allusion to his plus-sized body in the Chippendales line.

"To all rappers: shut up with your shutting up / And keep ..." (MF Doom – Beef Rapp) | accepted

There is a self-deprecating dig in here as well — DOOM doesn’t have the kind of body that sells in magazines and album covers.

"Whether is it animal, vegetable, or mineral / It's a mira..." (MF Doom – Beef Rapp) | accepted

“Animal vegetable mineral” a nod to lyrics from Gilbert & Sullivan, “The Major-General’s Song”

"It speaks well of the hyper base / Wasn't even tweaked an..." (Madvillain – Rhinestone Cowboy) | accepted

Isn’t that “hyper base”, as in fan base? Makes more sense in context.

"Hip hop sharecroppers" (Madvillain – Rhinestone Cowboy) | accepted

The line has racial connotations as well — sharecroppers were predominantly black, and the arrangement was almost always exploitative, as black farmers would work the land and then give almost all the proceeds to absentee white landlords. A possible shot at the music industry.

"Masked pump shotty, somebody stop me" (Madvillain – Rhinestone Cowboy) | accepted

Note that “somebody stop me!” was a catch-phrase from The Mask.

"Hold the cold one like he hold a old gun / Like he hold t..." (Madvillain – Rhinestone Cowboy) | accepted

Note that a gun becomes a microphone, which he then uses to “steal the show,” literally, as though he is perpetrating a stick-up.