I could be wrong, or it could have different meanings, I don't know. But from first verse to the chorus it sounds like it could be:
S-superstar, girl, i'm ready for you mama!
Why you think the only thing i got on is my pyjamas?
[Chorus x2]
So bad
So good that i'm so bad
Guarantee i'll be the greatest thing you ever had
Cause you aint never met nobody like me
And you aint gonna want to fuck nobody else again.
(He was a bad/rebel kid, but that made him into the rapper. Everything that happened in his childhood has formed his ideas for his songs. He's stating that he's is the greatest kid she ever had, or "thing" she ever had. His mom never met anyone like him before, because, let's face it, he's pretty damn original lol. And after him, his mom won't want to fuck no one else again? So no more kids.)
Not the whole song, cause that'd be really damn weird if the whole song was about his mom. But just an idea, might be wrong, and now that I'm typing it, I'm leaning towards me being wrong, or not close.