"... It's one of the few countries in the world where the workers don't go on strike."
Boos, cheers, laughter.
The King said: "Anyway, I want to see the boys in blue and khaki jumping to it and shouting Sah and getting on with the job ..."
- 1985 by Anthony Burgess
I can not understand what does "Sah" (emphasis mine) mean in this sentence. That word is written in italic in the real book.