Definition of bag (or bundle) of nerves in English:

bag (or bundle) of nerves

phrase

informal
  • Someone who is extremely anxious or tense.

    ‘when her relationship started getting serious, she became a bag of nerves’
    • ‘The character on bass, who I believe is Eric Melvin from NOFX, makes a fine MC, nicely managing the exits and entrances of various drunkards, narcissists, and bags of nerves.’
    • ‘I think it's odd how a succession of good, competent defenders have turned into bags of nerves who make mistakes within a month of playing next to Bramble.’
    restless person, bundle of nerves
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