What is Christpuncher?
1.
One who takes one's fist and firmly inserts it into the asshole of the lord Jesus Christ.
Popularised by youtube blogger 'CapnOAwesome'.
That kid is a total christpuncher, he actually believes all that stuff.
See
2.
It means someone who's just a total jerk, someone that is such a bastard, they would punch Christ.
"God, Jeff in Accounting took the last bagel"
"Yeah, that guys a real Christpuncher"