kilkenny cat
Preserved but no longer current.
A popular simile for a voracious or desperate animal or person, from the story of the two cats in that county, who are said to have fought and bitten each other until a small portion of the tail of one of them alone remained.
Era: ca. 1874 (Victorian)
Sources & notes
Historical definition reproduced from Hotten’s The Slang Dictionary (1874, public domain; Project Gutenberg #42108, retrieved 2026-07-31). Reflects the attitudes of its era.
Common questions
What does “kilkenny cat” mean?
A popular simile for a voracious or desperate animal or person, from the story of the two cats in that county, who are said to have fought and bitten each other until a small portion of the tail of one of them alone remained.
Is “kilkenny cat” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.