An expletive used to express shock, anger, dismay, etc. used similarly to "Jesus Christ" or "Holy Shit."
Best used in public situations or when conversing with religious believers.
Several synonyms may be used in the same way. For example "Holy Member of Jesus," "Christ Cunt," and the increasingly popular "Christ Phallus"
Christ Cock! I missed tonight's episode of Survivor!
Holy Phallus of Christ that woman is attractive!
Christ Cunt! I can't find my keys and I'm late to work!