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Derives from the words cranium, meaning 'head', and anus, meaning 'ass'. A possibly genetically inherited and chronic mental(/physical) disorder, in which one's head becomes so far up their ass, it leads to delusional thinking and insistence that they are always right, regardless of their friend's/family's input on their life decisions, when in fact a normally sane person or former case may interpret their actions/statements/beliefs (of their such actions) as, in fact, retarded.
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