jamboree

noun
  1. 1

    A boisterous or lavish celebration or party.

  2. 2

    A frolic or spree.

  3. 3

    A large rally of Scouts or Guides.

  4. 4

    In euchre: an undefeatable hand containing the five highest cards.

Source: https://en.wiktionary.org/wiki/jamboree