noun[mass noun] informal , dated
- I wouldn't get too worked up about this, you might have to take French leave to sort it out.
- I'm beginning to think you took a French leave from the Rangers.
mid 18th century: said to derive from the French custom of leaving a dinner or ball without saying goodbye to the host or hostess. The phrase was first recorded shortly after the Seven Years War; the equivalent French expression is filer à l'Anglaise, literally 'to escape in the style of the English'.
Definition of French leave in:
- The US English dictionary