by-your-leave['bai,jɔ:'li:v]

• n.请对方允许的要求；道歉，赔不是，对不起(因未得许可而作某事的道歉话)
• 短语:
  • without so much as a by-your-leave 径自，擅自，未经允准地，连请对方允准的要求都没提出