triumphalism
noun
tri·um·phal·ism
trī-ˈəm(p)-fə-ˌli-zəm
: an attitude or feeling of victory or superiority: such as
a
: the attitude that one religious creed is superior to all others
b
: smug or boastful pride in the success or dominance of one's nation or ideology over others
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Merriam-Webster unabridged
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