sick as a cat
Preserved but no longer current.
Meaning · English
Cats are very subject to vomiting. Hence one is said to cat, or to shoot the cat in vomiting.
Era: ca. 1898 (Victorian)
Sources & notes
Reproduced from Brewer’s Dictionary of Phrase and Fable (1898 edition, public domain; archive.org, retrieved 2026-07-31; OCR text, minor errors possible). Reflects the scholarship and attitudes of its era.
Common questions
What does “sick as a cat” mean?
Cats are very subject to vomiting. Hence one is said to cat, or to shoot the cat in vomiting.
Is “sick as a cat” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.