adjective
having or showing an exaggerated opinion of one's own importance, wealth, or social status
preposition
used to indicate a position or location that is higher than something else
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She has a reputation for being stuck up and unapproachable in social settings.
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I can't stand hanging out with her, she's so stuck up.
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Why are you being so stuck up about it? Just chill out.
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His pride and ego were so inflated, he was practically stuck up to the ceiling.