Christianesenoun.
A language or linguistic style that is understood only by, or appeals only to, practicing Christians.
Example Citation:
"Kutz and many other pastors prefer to share uplifting yet realistic stories about how faith has helped people through trying times. Marsh says it is especially important not to preach the Easter message in "Christianese,'' using obscure biblical terms and references."
Dave Schleck, "A Time of New Beginnings," Daily Press, April 12, 1988