"Popeye, heavy on the spinach" (MF DOOM – Microwave Mayo) | pending

Spinach is also slang for marijuana and green money.

"Get a grip like Spalding" (MF DOOM – Ballskin) | pending

"Get my money on the street like a panhandler" (Apathy – Army of the Godz) | pending

I think he also means he gets money on the street from drug deals.

"Me and Crypt are like the legion of doom" (Apathy – Army of the Godz) | accepted

By Legion of Doom he means WWF wrestlers Hawk and Animal, also known as the Road Warriors.

MF DOOM – Angelz | pending

More accurate lyrics are here:
http://rapgenius.com/Ghostface-killah-angeles-lyrics#lyric

"Threw on the boxers, searching for the Treo" (MF DOOM – Angelz) | pending

GRABBED UP THE BOXERS

"These Bushes keep acting like they’re Corleone" (La Coka Nostra – Choose Your Side) | pending

I think Everlast is saying the Bush family act like a Mafia or gangster in general, and more or less get away with murder.

"Terminator 3" (Non Phixion – Futurama) | pending

It’s worth mentioning the Terminator 3 film was released about a year after this album.

"[Rodan]" (MF DOOM – Who You Think I Am) | accepted

"[Kamackeris]" (MF DOOM – Who You Think I Am) | accepted