94 entries under idiom topic. ×

17
under the weather(expression, adjective, adverb, weak)
10
out of sorts(expression, adjective, disease, ill)
3
in poor health(expression, adjective, mean, bad)
2
not all there(expression, crazy, crackers)
2
taken ill(expression, disease)
1
all torn up(expression, adjective, hurt, low)
1
be ill
1
bereft of reason
1
crazy as a loon(expression, crazy, crackers)
1
deprived of reason
1
feeling something terrible
1
foaming at the mouth(expression, adjective, enthusiastic, ill)
1
good and tired
1
in a bad way(expression, adjective, mean, bad)
1
non compos mentis
1
not quite right
1
not so hot(expression, adjective, mean, bad)
1
nutty as a fruitcake(expression, crazy)
1
of unsound mind
1
on a downer(expression, adjective, sad, unhappy)
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APASmart Define. (2016). sick thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/sick/thesaurus/synonyms
ChicagoSmart Define. 2016. "sick thesaurus" https://smartdefine.org/sick/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, sick thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/sick/thesaurus/synonyms>.
MLASmart Define. "sick thesaurus" 3 April 2016. Web. 24 September 2026. <https://smartdefine.org/sick/thesaurus/synonyms>