I encountered the boldfaced expression while reading, and would like to know what it means:
“Why would you like a commission, Martin?”
“As an ordinary seaman, sir, one’s the minutest cog in a machine. As an officer one would have more chance of hitting the old Hun for six, sir, actually.”
- William Golding, Pincher Martin, Chapter 7
I learned in the dictionary that "hit (someone) for six" could mean "have an unpleasant effect on (someone)." But I am curious as to why he had to hit "for six," and, why "the old Hun."
This novel is set during the Second World War, so I guess "Hun" could mean a German soldier, but I cannot grasp how it is different from saying "the old Hun" and just "Hun".