Definition of a — and a half in US English:

a — and a half

phrase

informal
  • Used to indicate that one considers a particular person or thing to be an impressive example of their kind.

    ‘Aunt Edie was a woman and a half’
    • ‘Someday I'll find a woman and a half and take her hand.’
    • ‘You'll have a vacation and a half with that sort of money!’