derived from the more literal translation of to buff, or shine.
may be pronounced 'shine-ee' for extra emphasis.
invented by a brother and sister in hertfordshire because they didn't like using the term buff.
"yeah, 'e is bare shiny!"
"d'you see sheila?"
Chris - How you doin', bud?
Alex - I'm going to the bathroom; I'm shiny. You want to join me?
Chris - Right behind you.