The Collaborative International Dictionary of English v.0.48:

Corroboree \Cor*rob"o*ree`\, n. [Also corrobboree, corrobori,
   etc.] [Native name.]
   1. A nocturnal festivity with which the Australian aborigines
      celebrate tribal events of importance. Symbolic dances are
      given by the young men of the tribe, while the women act
      as musicians.
      [Webster 1913 Suppl.]

   2. A song or chant made for such a festivity.
      [Webster 1913 Suppl.]

   3. A festivity or social gathering, esp. one of a noisy or
      uproarious character; hence, tumult; uproar. [Australia]
      [Webster 1913 Suppl.]