With little or no preparation or forethought. Synonyms:ad-lib, extemporaneous, extemporary, extempore, impromptu, off-the-cuff, offhand, offhanded."An extemporaneous piano recital" , "An extemporary lecture" , "An extempore skit" , "An impromptu speech" , "Offhand excuses" , "Trying to sound offhanded and reassuring" , "An off-the-cuff toast" , "A few unrehearsed comments"
... a moist trench, I am told That you performed an unrehearsed lustration; That there you linger, having caught a cold, Followed ... — Punch or the London Charivari, Vol. 147, October 7, 1914 • Various Read full book for free!
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