A word used to describe a person who doesn't fit in, or doesn't abide by social norms. The adjective is more positive than neutral, so idiosyncrasies in a person is a good thing.
She was an idiosyncratic girl, who really stood out from the crowd.
Any method or procedure
based in ritual or dogma
that continues by force of momentum
beyond the limits of common sense,
excepting personal, faith-based sacraments, of course.
The idiotsyncracy of democracy evolved solutions to its own travesties...
the 'square deal, square meal' plan, for example.