noun
a sound or exclamation often associated with speed or sudden movement
interjection
used to express excitement or enthusiasm
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The car sped past with a loud 'kachow' as it accelerated down the highway.
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I revved my engine and shouted 'kachow' as I raced my friend to the finish line.
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When Lightning McQueen wins a race, he always shouts 'kachow' in victory.
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Her energy and enthusiasm for life always make me feel like shouting 'kachow' in excitement.