Howdy wongadonga:
With questions about word usage like this I usually find it best to go back to where the word came from – Annie. She uses the word “quit” five times in the short story – and tellingly at some of the most critical scenes in the story –
1. "Jesus Christ,
quit hammerin’ and get over here”
2. free to drop things,
quit if he had to, and go into the mountains at short notice . . .
3 & 4 . "Jack, I got a work. Them earlier days I used a
quit the jobs. . . . . Let me tell you, I can't
quit this one.
5. I wish I knew how to
quit you."
I say this only because we know Annie is very thorough and leaves nothin' to chance. If the word is here five times, there's a pretty good reason for it. Especially in this case where Jack first uses quit just moments before they are seen having their first sexual encounter and then at the end where he uses just moments before they part and he dies. Moment's here meaning moments in the storyline not necessarily real time.
This probably not coincidence. Annie's getting us ready for Jack's final use of this word;
quit hammerin’,
quit the job(s),
quit you.
To more directly answer your question, I'd say no it's not common usage, but it's not unusual enough so that most everyone wouldn't understand right away the meaning, especially after being “set-up” by Annie in this manner. It's short, simple, unambiguous in its intention. And here it means more than just leaving, it means (trying) to bring an end, a cessation, and this is what Jack can't do, doesn't know how to do. He leaves Ennis several times a year, they separate and he goes back to Texas, etc. but he can't quit Ennis, and the
idea of Ennis. It is in him in a way that maybe he (or Ennis) doesn't understand. So, IMHO anyway, Randall or no Randall, Jack wasn't going to be able to quit the emotional ties he had with Ennis.
