It's EYE-gore.

Legend has it that Buddy Holly was watching The Searchers and it was such a great line he got the idea for the song then and there
and from Big Jake ..... "I heard you were dead" "Not Hardly" and then later "Dead? The next person who says that I'm gonna shoot, so help me."
almost as good as "I know I'm gonna use good judgement. I haven't lost my temper in 40 years, but pilgrim you caused a lot of trouble this morning, might have got somebody killed... and somebody oughta belt you in the mouth. But I won't, I won't......The hell I won't" from McLintock - start of the best mud fight west of the Mississippi