Meaning of without so much as a by-your-leave in English:

without so much as a by-your-leave

(also without a by-your-leave)

phrase

informal British
  • Without apologizing for rude or unwelcome behaviour.

    ‘she came in without so much as a by-your-leave’
    • ‘I was put on hold without so much as a by your leave.’
    • ‘No, here were some of the top people in the dotcom world and these youngsters just walked out on them in mid sentence without a by your leave.’
    • ‘My Lord, I ask for leave to appeal in respect of both of your Lordship's decisions, and with your leave I will go on to say why?’
    • ‘The Virginia Department of Taxation has gone from examination of no records to collection of a naked assessment without so much as a by your leave.’