Wazzarium 

Used in the "Confessions of Georgia Nicolson" books, the wazzarium is the toilet, lavatory, rest room etc.

Person 1: Oi mate where you going?
Person: I'm off to the wazzarium

Wazzarium by hannahsheeeeeeeeeeeep June 6, 2010

wizzerium 

Bathroom. Location of one or more wizzers.

I'm going to the wizzerium.

wizzerium by 82sdille November 11, 2009

Wankarium 

n.
A box room containing a chair, a computer and a sock drawer.

Stuck for things to do one day, Jeff made good use of his Wankarium.

Wankarium by SamThatBlokeInBognor May 19, 2005