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alley cat

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alley cat

pejorative A person (often a woman) of immoral or promiscuous behavior, especially a prostitute. When speaking of men, "tomcat" (or tom cat; literally, a male cat) is the usual equivalent. I'd be wary of her. She's known around here as a bit of an alley cat.

See also: alley, cat

alley cat

A promiscuous woman; also, a person of loose morals. For example, She's constantly picking up men in bars-a real alley cat. This idiom transfers a stray cat that frequents alleys in search of food to a woman of easy virtue, especially a prostitute seeking customers. [Slang; early 1900s]

See also: alley, cat