triumphalists

/traɪˈʌmfəlɪsts/
noun
  1. People who celebrate or boast about a victory or success, often in a way that shows excessive pride or disregard for others.
    • Historians often criticize triumphalists for ignoring the suffering caused by the wars they celebrate.
    • After the election, the triumphalists held a loud parade through the city, angering those who had voted for the other side.
    • The coach warned the team not to become triumphalists after their first win, reminding them there were many games left.
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