rob the cradle

rob the cradle idiom
Have a romantic or sexual relationship with someone much younger than oneself, as in The old editor was notorious for robbing the cradle, always trying to date some young reporter. [Colloquial; first half of 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.

Comments
Improve this definition.
Do you have more to add? Share your linguistic knowledge or observation.
/Register to save your comments.