noun
a person who acts in a smart-alecky or sarcastic manner
adjective
showing or characterized by intelligence or good judgment
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He was known for making sarcastic remarks, often being referred to as a wise ass.
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Don't be such a wise ass and just tell me what you really think.
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That guy thinks he's a real wise ass, always making snarky comments.
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Being a wise ass may get you some laughs, but it won't earn you any respect in the long run.