bird of passage

bird of passage idiom
A transient, one who is here today and gone tomorrow. For example, Mary moves nearly every year; she's a true bird of passage. This phrase transfers the literal meaning of a migrating bird to human behavior. [Second half of 1700s]

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.