Peter Brandt writes:
 > Martha:
 > >Peter, Thanx for posting this article to us.  Any idea what an Xtoid is?  Or
 > >thanatos-driven?

 > No, I do not have a clue. Some kind of slang I guess.

I think, thanatos is the death force, the counterpart of Eros (life
force) in the work of the late Sigmund Freud.

Any (self)-destructive behavior is denoted as thanatos-driven.

Regards

Christian