What does the Scots expression "deoch an doris" apply to?

Question

Of the various origins suggested for the Australian expression "fair dinkum", one is Midlands English; which is another popular one?

Answer 1

A farewell drink
The expression literally translates as "drink of the door", in current terminology "one for the road", the Scots term for the practice of providing one last drink for their guest before leaving for the journey home; it was popularised widely in a song by Sir Harry Lauder (1870-1950) written in 1911.