"Everything's shiny, Cap'n. Not to fret."
The word "shiny" makes us happy, cause it makes us think of Kaylee. Best single-word description of her personality.
Q. Where did the term 'shiny' come from? Who coined it and how did it become a Firefly catchphrase?
A. I made up the word 'shiny' as a thing that is good because things that are shiny tend to be attractive and exciting and catch our attention. It was then explained to me by David Lester, a Producer on the movie, that shiny was actually an old western phrase meaning good that it was in common usage many years ago but I didn't know that, I thought it was futuristic but that just goes to show you what I always say, that the future is made up of the past.
-"Joss Answers More Questions From The Browncoats!", posted Sep 23, 2005 5:20 pm on http://browncoats.serenitymovie.com/serenity/
And sure enough. If you go to the OED, they quote Rudyard Kipling using it in this context in 1915:
b. fig. Beaming, radiant. Also, apparently excellent.
1915 R. Kipling Fringes of Fleet 40 'Why didn't you then?' I asked. There were loads of shiny reasons.
Who knew? Well, obviously, some very dedicated Browncoats.
"Shiny" printed in a yellow spray-effect (like the Firefly logo) on a black, 100% cotton shirt.