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Adjective: cock-a-hoop  ,kó-ku'hoop
  1. Exhibiting self-importance
    "cock-a-hoop talk";
    - boastful, braggart, bragging, braggy, big, crowing, self-aggrandizing, self-aggrandising [Brit]
  2. Full of high-spirited delight
    - elated, gleeful, joyful, jubilant, gleesome [archaic], on top of the world

See also: joyous, proud