A fight between cats.
The caterwauling from the catfight in the back yard was awful; I couldn't get to sleep until it was over.
An acrimonious fighting or bickering between women; so named because, like cats, scratching is a common defensive tactic among women, as opposed to a fistfight between men.
Nancy and Sheila got into a catfight when Nancy's boyfriend cheated on her with Sheila.