A non-scientific condition in which a person has a head that is much to small for their body. This condition is often exacerbated by the individual's insistence on shaving their head. Also known informally as pin-head syndrome and cretinism. May be accompanied by slight retardation, or just a bad attitude.
That cretin down at the restaurant has a bad case of microcranialism, but I'd still nail his sister.
by Big Tilly September 22, 2006
Get the microcranialism mug.