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1.
In its simplest form, Christfucker is a derogatory term for Christians. This can be used for any denomination of Christianity.
"That guy is a Christfucker." "Christian music is for Christfuckers."
by Kacen September 10, 2006
 
2.
Someone who uses religion for alternative means. To achieve an alternate goal outside of the religions prescribed motives.
That car salesman is just wearing a crucifix because he wants to get all the old-ladies to by from him. What a Christ fucker!

George Bush is a Christ fucker.
by Shming80 January 24, 2011
 
3.
Someone that fucks you just when you're being Christ-like in your coolness towards them, or just some funny shit to spew.
Yo, ass-face, I just gave you that move back, how can you checkmate me? Christ fucker!
by SvenTwelve May 21, 2008
 
4.
A person who fucks only those of the Christian Denomination.
Guy 1: Dude, why is that is you are such a christfucker?
Guy 2: Because they love anal!!!!
by JW6854 October 26, 2007