sick as a cat
Proposed by a contributor, not yet supported by evidence.
Where it’s used:
Used
American English
Examples
`My head is splitting, my body is trembling, and I am as sick as a cat.'
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “sick as a cat” mean?
Very ill.
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.