or medley, subs. (common).A sing-song whereat everybody sings and plays at the same time as everybody else; a hubbub.
1814. SCOTT, Waverly, ch. xi. And now the Dæmon of Politics envied even the harmony arising from this DUTCH CONCERT, merely because there was not a wrathful note in the strange compound of sounds which it produced.
1871. Daily Telegraph, 23 March. Lord Derby on Pauperism. It happens that instead of the harmony which should exist where good men and good women are, working together for a common object, you have something like what is popularly known as a DUTCH CONCERT, or in other words, every man playing his own tune on his own instrument.