Definition of do a line with in English:

do a line with

phrase

NZ, Irish
informal
  • Have a regular romantic or sexual romantic relationship with (someone)

    ‘I knew if I went home for Christmas I'd have to pretend I was doing a line with some man’
    • ‘They danced with us early in the night and after their social responsibilities to us were over, they went off to dance with whomever they were doing a line with, or women of their own age.’
    • ‘Veronica told her that in the four years she had been doing a line with Andy, she never risked bringing him inside the door in case Jacko had drink in him.’