alley cat(redirected from an alleycat)
A derogatory term for a person (typically a woman) considered immoral or promiscuous, especially a prostitute. The term "tomcat" (or "tom cat," literally a male cat) is more common when referring to a man. I'd be wary of her. She's known around here as a bit of an alley cat.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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]
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.