How did Eminem get the nickname Slim Shady?

Answer 1

He took it from his two favourite characters in fiction. He loved Slimer from Ghostbusters but dropped the last two letters. The other character is Nightshade. Same thing with Slimer, he took off the Night part and replaced the e with a y to create shady. So now you have Slim Shady! Intelligent chap he is!

Answer 2

Eminem is in the Rap group D12 (Detroit 12), but there are only 6 members. So their plan was to each have an alter ego, making "12 Members". Eminem was on the toilet while he was trying to think of a good name. Slim Shady came to mind, and he though of all these things he could rhyme it with. So it stuck.

Answer 3

Because his name is Marshal Matters. Eminem, MM, Marshal Matters. Get it?

Using his first and second name:
Marshall Mathers
He created M&M
But later changed the spelling to:
Eminem or Slim Shady

Answer 4

When Eminem joined the rap group D12, one of them suggested they all make alter egos so the group would have '12' members. (There were 6 members.)

Answer 5

It was when he started rap battling, He was named M&M ( for marshall mathers) and that's when Eminem came.

Answer 6

Eminem Got his nickname by eating m&ms.