A precious boy of any age, but typically between the ages of 14-54 that needs protection. They are not necessarily weak or naive to an extreme factor, but often are to some degree.

Typically coined within the anime media sphere.
Arslan Senki is a shiny boy.
by Joshmala January 3, 2018
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A very stuck up boy with nice hair, and you know how most boys desks are not neat, well a Shiny haired boys desk is very neat. Many girls, especially ones with the name of Isabella, Bella or Anaya will have dreams about him or fantasize about his hair. If you find any boys like this I recommend that you instantly run away because they will blind u with their hair.
Oh my god, that guy is such a shiny haired boy.
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