1
general::
Phrase(s): a bundle of nerves
a very nervous person. • I was a bundle of nerves before my dental appointment.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Extremely jittery, tense, or fearful person, as in For months after the accident, Aunt Jane was a bundle of nerves. [1930s]
American Heritage Idioms