Mister Supernumerary is my personal favourite.
Dean Clifford is fond of the very accurate "Mister Unauthorized Administrator".
When I am feeling particularly hostile I'll reverse the Gender designation. If it is a woman, I will use Mister, and if it's a Man, I'll use "Miss". :D
Derek Hill said it best (I Still can't believe I'm typing that); Drop the "Your Honour". They are simply "YOU".
Printed copy · Anthology Volume 9, page 864 · cut by a page breakPrinted copy from The Tender For Law Anthology, Volume 9, page 864 (printed 13 June 2014). Added by this site; not part of the Facebook export. A page break in the printout cut off the beginning of this comment, with its name.