Fun words: Ultracrepidarian

This one is just an awesome one. I think it could have many uses.

1) New supervillian name. BEHOLD – I am the Ultracrepidarian.

2) Heavy metal band

3) A creepy bug with a lot of legs

At a  quick glance, I’d say it means something like a super creepy person (ultra and most of creep). However, it means: one who is presumptuous and offers advice or opinions beyond one’s sphere of knowledge

In other words, a know it all. But think how awesome it’d be to say to someone annoying in a meeting/social gathering/family get together “How great to see you, my favourite ultracrepidarian” and see how they react!

What would you  make the meaning of this word if you could?