Someone goes to type "holy crap" but ends up typing "holy carp" instead, resulting in mental images of a carp who has been blessed by the Lord Almighty.
Human or animal excrement that has been sanctified by some higher being, whether it be God, Allah, Buddha, Oprah, or some other divine power of the universe, usually as a means to spite a non-believer through an obvious metaphor for crap-slinging.