Definition of "shiny"

shiny

/ˈʃaɪ.ni/

adjective
comparative shinier or more shiny, superlative shiniest or most shiny
1. Reflecting light.
  Quotations
  Bender: Bite my shiny metal ass!
  Futurama
2. Emitting light.
3. (colloquial) Excellent; remarkable.
  Quotations
  We're shiny, Okay?
  2007, Christopher Brookmyre, Attack of the Unsinkable Rubber Ducks, page 132
4. (obsolete) Bright; luminous; clear; unclouded.
  Quotations
  Like distant thunder on a shiny day.
  1665, John Dryden, Verses to her Royal Highness the Duchess [of York]
  When I was bound apprentice in famous LincolnshireFull well I served my master for nigh on seven yearsTill I took up to poaching as you shall quickly hearOh, 'tis my delight on a shiny night in the season of the year.
  The Lincolnshire Poacher (traditional song)
noun
plural shinies
1. (informal) Anything shiny; a trinket.
2. (slang) Contraction of disparaging term "shiny arses", originating during World War Two, to describe a desk worker.