Definition of a new one in US English:

a new one


  • An account, idea, or joke not previously encountered by someone.

    ‘I've heard of lazy, but somebody being too lazy to talk—that's a new one on me’
    • ‘That's a new one on us, a new one that we hope goes straight out of fashion.’
    • ‘Dealing with complaints when I'm not even clocked in is a new one even for me!’