get cold feet
To experience nervousness or anxiety before one attempts to do something, often to the extent that one tries to avoid it. I wasn't nervous until the morning of my wedding, but everyone assured me that I had just gotten cold feet. Good luck getting her out on stage—she always gets cold feet before a performance. It's normal to get cold feet when you're making a big life change like this.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.
cold feet, get
Also, have cold feet. Retreat from an undertaking; lose one's nerve. For example, I got cold feet when I learned the trip involves white-water rafting, or Don't count on including her-she's been known to have cold feet in the past. The origin of this term has been lost. In early 17th-century Italy it meant to be short of money, but that sense has never been used in English. [Late 1800s]
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.