'Kilkenny cats' definitions:

Definition of 'Kilkenny cats'

From: GCIDE

Kilkenny cats \Kil*ken"ny cats\n. Two cats fabled, in an Irish story, to have fought till nothing was left but their tails. It is probably a parable of a local contest between Kilkenny and Irishtown, which impoverished both towns. [Webster 1913 Suppl.]