lose (one's) nerve

lose (one's) nerve

To no longer have the courage to do something. I did want to ride the roller coaster earlier, but I'm starting to lose my nerve now that we're actually here.See also: lose, nerve

lose one's nerve

Become frightened or timid, lose courage. For example, I wanted to ski down the expert slope but then I lost my nerve. This expression employs nerve in the sense of "courage or boldness." [Early 1900s] See also: lose, nerve