A symphony nigger is a person who both hoards and denies access to a library of rare classical music. This word is primarily used among classical music buffs in chat rooms attached to file sharing services. It is common to hear a trade-only specifying member referred to as a 'symphony nigger.' It is a derogatory, but at the same time envious, designation.
Diane Weist is such a symphony nigger, she blocked my download of Wagner's Flying Dutchman again!