Green’s Dictionary of Slang

(US) a religious hypocrite.

1997–2002		Alt. Eng. Dict. 🌐 Christacrutchian An insult A bible thumping, back sliding hypocrite, [...] and simply called a Chian!!!!
1989–2003		R.O. Scott Gay Sl. Dict. 🌐 chian [1990s short for Christacrutchian] an insult. A bible thumping, back sliding hypocrite, or more technically known as a Backslidious Hypocritious.