nervous wreck

An individual suffering from extreme agitation or worry, as in Pat was a nervous wreck until her mother arrived at the wedding. This expression is nearly always used hyperbolically. [Colloquial; c. 1900] Also see basket case.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.