(Noun pl. "shinies")
A new initiate or member of a group, club, or organization, esp. fraternities and sororities.
Usually someone is labelled this immediately after initiation, pinning, or joining the organization, until the next group of people join. Used both affectionately and to patronize in a mentor-like way.
All you shinies, make sure you remember to make it to the general meeting Sunday!
I was talking to an enthusiastic shiny yesterday, I think they will spur us all on this semester.