One whose cranial cavity is filled with feces. A moron or idiot.
Although elected to high office his malapropisms and misguided attempts at leadership revealed him to be a true coprocephalic.
by K. Gould January 12, 2008
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having human excrement in the cranium, shithead
"Is it a Triassic human fetus or coprolite?"

"Given who 'found' it, don't you mean coprocephalic?"
by Xyzzy June 18, 2004
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