the 7 day theory 

also known as the don killuminati. An album by 2pac shakur. So called because the title song was thought of, written, composed and released in 7 days. The number 7 is related to the belief tha 2pac is alive.
e.g. his age when he "died" 25 (2+5=7) and the fact that he survived for 7 days before he "died".

person1: have you heard the seven day theory?

person2: Not only have i heard it but i believe it!!

the 7 day theory by tobio June 22, 2004

The 7 Day Theory 

The theory of 2pac faking his death. The number 7 is involved with this theory.

2pac is alive cuz the 7 day theory says so.

The 7 Day Theory by jerome December 6, 2003

The 7 Day Theory 

Tupac Shakur faked his own death, son!

Of course Tupac is alive! The 7 Day Theory is correct, son! I saw Tupac the other day ... he was working at a Country Fair with Elvis & President Kennedy!

The 7 Day Theory by Da Nastee One December 21, 2006

7Day Theory

a great achievement in the game Counter-Strike/also means the 7 Day Theory based on Tupac Shakur-took Tupac 7 days to die, and myth was that he would be back in 7 years(still to be confirmed)

I pulled a 7Day Theory(PWNAGE/l337 move)

7Day Theory by Kyle Varney October 25, 2003