A citizen or political figure who is a do-nothing, one who sits like a lame duck and does not participate in the contributing actions of normal society. An extremely boring citizen. A citizen who should be confined to a chair, perhaps even an electric one.
After Bush's presidency, he will be reduced from a poor political figure to just your average sitizen.
Shitizen (n.) can refer to those people who are officially citizens but treated unjustly by their government as if they are just indentured servants or even slaves.
When this meaning is used, often it is conveyed with compassion or self-mockery.
They say we are citizens, we know we are shitizens.
In our great Celestial Empire, if you are born to be a shitizen, you will be a shitizen here forever. Go abroad, my friend, only the dumbs remain.
When a toilet is so disgusting and covered with piss/ shit you have to hover over the seat to take care of business. Typically performed in public restrooms.
Dude 1: Yo dude, I was taking the browns to the Super Bowl in a Walmart bathroom the other day, the toilet was so gnarly I had to do an upstanding shitizen!