54 entries under expression topic. ×

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high falutin(mock, affected)
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hyped up(mock, affected)
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make up(verb, phrasal verb)
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musical passage
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not disclosed(adjective, unexpected)
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not genuine(mock, affected)
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not kosher(mock, affected)
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not planned(accidental, unintended)
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not ready(unqualified, unsuspecting, unready)
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off your own bat(idiom, willing, spontaneous, unforced)
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soft shell(mock, affected)
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sudden thought(idiom, impulse)
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without preparing(adverb, spontaneously, improv, extemporaneously)
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without rehearsal(adverb, spontaneously, improv, extemporaneously)
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APASmart Define. (2016). impromptu thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/impromptu/thesaurus/synonyms
ChicagoSmart Define. 2016. "impromptu thesaurus" https://smartdefine.org/impromptu/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, impromptu thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/impromptu/thesaurus/synonyms>.
MLASmart Define. "impromptu thesaurus" 28 January 2016. Web. 21 September 2026. <https://smartdefine.org/impromptu/thesaurus/synonyms>