Translates to "Thee Ass." If someone has a nice ass..it abbreviates to Z.
Look over there, that girl has a Z!
by Maggie K May 08, 2005
A painful zit, or pimple that is located on your butt crack, sometimes premature and very difficult to get rid of.
I couldn't sit down comfortably or get any sleep last night because of my Zass. I wish they made neutrogena Zass cream.
by Dr.Ed August 17, 2012