zbidder 

Someone who bids on zbiddy auctions.

You can tell that guy's an experienced zbidder cause he never loses any auctions on zbiddy.

zbidder by auctionman May 28, 2011

Zidder 

A name given to someone who looks like a vagrant/bum.

Vagrant " see that guy over there, he ain`t no bum
he`s just a zidder"

Zidder by thE blanC March 15, 2009