> 
> 'A-why,' says he, 'I was out a-hunting today, and I got away to a
>  place in the wood I'd never seen before. And there was an old
>  chalk-pit. And I heard a kind of a sort of humming. So I got off my
>  hobby, and I went right quiet to the pit, and I looked down. Well,
>  what should there be but the funniest little black thing you ever set
>  eyes on. And what was that doing, but that had a little
>  spinning-wheel, and that was spinning wonderful fast, and twirling
>  that's tail. And as that span that sang:
> 
> 
> **Nimmy nimmy not.** My name's Tom Tit Tot.'
> 
> 
> 

This content is from "Tom Tit Tot" in English fairy tales.

What's the meaning of "nimmy"?