noun
a person who uses pretentious language or behavior
adjective
pompous or pretentious in speech, style, or manner
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The professor's highfalutin language was difficult for the students to understand.
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I can't stand his highfalutin attitude, always acting like he's better than everyone else.
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She's always talking in that highfalutin way, like she's too good for us.
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His highfalutin ideas about success are not practical in the real world.