45 entries under idiom topic. ×

8
off the cuff(expression, adjective, free, ready)
5
off guard(expression, adjective, adverb, inattentive)
2
ad hoc(expression, adjective, free, unplanned)
2
on the hop(expression, suddenly, unexpectedly, unawares)
2
shot from the hip(expression, adjective, unplanned, unrehearsed)
1
without preparation(expression, impromptu, extemporaneous, nonpreparation)
1
according to pleasure(expression, informal, unplanned, extemporize)
1
as one thinks best(expression, informal, unplanned, extemporize)
1
as one wishes(expression, informal, unplanned, extemporize)
1
caught off balance
1
caught off guard(expression, adjective, ready, unqualified)
1
free and easy
1
not cut out for(expression, incompetent, unqualified, inept)
1
not equal to(expression, adjective, inadequate, incompetent)
1
not up to(expression, adjective, inadequate, incompetent)
1
off the top of head(expression, free, impromptu, unrehearsed)
1
played by ear(expression, adjective, ready, unqualified)
1
taken by surprise
1
taken off guard(expression, adjective, ready, unqualified)
0
asleep at switch(expression, adverb, ignorantly, unwatchful)
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APASmart Define. (2015). unprepared thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unprepared/thesaurus/synonyms
ChicagoSmart Define. 2015. "unprepared thesaurus" https://smartdefine.org/unprepared/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, unprepared thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unprepared/thesaurus/synonyms>.
MLASmart Define. "unprepared thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/unprepared/thesaurus/synonyms>