In the 60's, a girl would get pinned by a guy when he made her his girlfriend. Ya know, after many dates, and the guy was ready to call her his girlfriend, he would formalize it by putting a
silvery pin on her. So getting "pinned" means u are now taken. Watch the Dick
Van Dyke version of
Bye Bye Birdie, especially the song "The Telephone Hour." They use the term pinned quite a lot.
Have you heard about
Hugo and Kim?
Did they really get pinned?
Did she kiss him and cry?
Did he
pin the pin on?
Or was he too shy?
Well, I heard they got pinned...