....and bugger off'
Sounds to me like the captain has been hanging around Australians or Englishmen a lot. Or both.
After doing strings of XXX-YYY-XXX sectors in a row who hasn't accidently said YYY on the PA when you're on your way to ZZZ? Big deal but it should be corrected diplomatically.
As for cockpit punchups this is extremely unprofessional. It should be best left to the car park afterwards then down the pub for the kiss and make up beers. Standard streetwise CRM.
