the salted roe of large fish, e.g. sturgeon, eaten as a delicacy
caviar to the general
something considered too delicate, refined, or lofty for mass appreciation
[from Shakespeare, Hamlet II.ii.439, where Hamlet addresses the players: ‘For the play, I remember, pleased not the million. ‘Twas caviare to the general.’ General here means ‘the general population’.][obsolete Italian caviaro from Turkish havyar]