Shenisser
A girl who stands to pee, wether she has a tool to assist her or not. These tools include the shenis or the shewee. If a woman does not have tools, she should spread her legs, and pull the front of her groin up so the urine squirts straight ahead. If this is not done, then urine will fall straight down and soak and pants, thongs, pads, or underwear that may be sitting between a woman's legs.
When Jill found out that Mary was a shenisser, she was greatly intreagued. She watched Mary urinate many times untill she had the art down pat.