KJV Only.
A name, often but not always used pejoratively, for Christians who consider the King James Version of the Bible to be the only authentic expression of the Word of God.
"If it's good enough for Jesus Christ, it's good enough for me!"
This quotation, or one of its dozens of variations, is frequently attributed to Miriam "Ma" Ferguson, the first woman governor of Texas, usually in the context of her opposition to the idea of teaching Spanish in schools in the 1920s. The sneered repetition of the quote is meant to demonstrate that Texans, Christians, women, or the members of some other sub-population of Americans are obviously much too ignorant to recognize that Jesus spoke Aramaic, and that the New Testament was written in koine Greek.
But... is anyone actually that ignorant? Texan, Christian, woman, or otherwise? It seems likely that Ma Ferguson never said this (though I'm willing to be corrected). At the same time, though, "KJVO Christians" do exist, and they do consciously reject the use of Greek, Hebrew, and Aramaic in their own Bible study.
"Maybe it's possible to justify the use of a seventeenth-century English translation of the Bible over a translation from the twentieth," my reader might be saying, "but surely it's downright irrational to say that any English version is better than the original autographs?"
Indeed. But people believe plenty of irrational things, and there are lots of KJVO's who forcefully defend their position on the Internet and in their churches. Perhaps the most famous of these is Jack Chick, whose apocalyptic comic books are eagerly collected by Christians and non-Christians alike. Chick makes his case by saying that the Bible itself occasionally describes the destruction of scriptures. In this view, God therefore must not be as interested in preserving "originals" as he is in making sure that only the best documents survive, guiding the movement of different Bibles through time to suit his purposes.
To me, this almost sounds like something Alfred North Whitehead would say, though I can't imagine Whitehead and Jack Chick agreeing on anything else at all.
Further Reading:
Jack Chick on new books vs. old books: http://www.chick.com/reading/books/158/158_01.asp
Another KJVO web site: http://www.purewords.org/kjb1611/
On the "good enough for Jesus" quote, see this interesting post from a mailing list for the discussion of American English: http://listserv.linguistlist.org/cgi-bin/wa?A2=ind0411D&L=ads-l&P=R6571
Note that what's called the KJV in North America is more often called the AV, or Authorized Version, in the U.K.