The name Calvin Broadus, (formerly "Snoop Dogg") gave himself after smoking so much hardcore dank jamaican kush while simultaneously listening to Bob Marley that he had some kind of weed-enduced epiphany where he came to believe that he actually was Bob Marley.
As Snoop inhales from a blunt and then exhales
Snoop- "Nigga, Nigga, Nigga...
Dre- "Whats up ma Nigga"
Snoop- "I shall no longer be the Snoop Dogg, and will forever be known as the Snoop Lion."