noun
a noisy and overexcited reaction or response to something
verb
to promote or publicize (something) in an exaggerated or sensational way
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The company's marketing team created a ballyhoo to promote the new product.
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There was a lot of ballyhoo surrounding the concert last night.
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I can't believe all the ballyhoo over that celebrity's new haircut.
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His ballyhoo about being the best player on the team was proven wrong during the game.