ˈalley cat noun [countable] a cat that lives on the streets and does not belong to anyone
[TahlilGaran] Dictionary of Contemporary English ▲
alley cat n.,
slang 1. A stray cat.
2. A person (usually a female) of rather easy-going, or actually loose sexual morals; a promiscuous person.
You'll have no problem dating her; she's a regular alley cat. [TahlilGaran] English Idioms Dictionary ▲