Music
The rapper told BBC's Newsbeat that he is often inspired during stints in his water closet.
He said: "I was sitting on the toilet and a lot of good material came out of that. This name popped into my head. I was kind of skinny and I thought maybe it should be something slim.
"And then for some reason Slim Shady popped into my mind and I just thought of 20 things to rhyme with it. I just thought 'This is it'. I went back in the room and just kept writing."
His memoirs, The Way I Am, go on sale today and also reveal that the hip-hop star still regrets his reaction to a comedy puppet at the MTV VMAs in 2002.
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