Sicmatial 

The feeling that while everything is going fine for you, you should be doing something else, and don't really belong where you are.

Steven has a good life and good friends, but nevertheless feels sicmatial.

Sicmatial by TaoFox November 24, 2010

Sigmaticle 

other worldy, out there, spacey, trippy

That was quite the sigmaticle performance.

Sigmaticle by brodudeman November 9, 2010