noun
a sound expressing surprise, excitement, or other emotions
interjection
expresses a sudden or strong feeling
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The company's out of office message stated that they would be OOO for the next week.
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I'm going to be OOO tomorrow, so don't expect a response from me.
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I can't wait to be OOO on my vacation next month.
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Her mind was OOO as she daydreamed about her upcoming trip.