Being cool in a cooler way than everyone else. Where 'cool' means smoking, drinking, bleaching your hair and generally being a chav, being Weloriantatious means you are your own genre, you do things differently which in turn makes you cool, except, not cool, weloriantatious.
Woah dude look at her! She's so weloriantatious!
I think I'll wear green tights today, I'm feeling weloriantatious.
That night I ran around with a gnome was SO weloriantatious.