A form of sleep paralysis in which the sleeper sees a figure resembling a witch sitting on them while still in bed.

hypotonia

(idiomatic) hypotonia

A rare inherited genetic disorder, caused by a deficiency of HGPRT, in which uric acid builds up in all body fluids.

(rare) gender identity disorder

abetalipoproteinemia

A rare symptom of brain damage occurring in the occipital lobe, in which the patient is "cortically blind" but affirms that he or she is capable of seeing.

A congenital overgrowth disorder characterized by an increased risk of childhood cancer and certain physical defects.

trichothiodystrophy

(computing, humorous) The tendency of computer users to think the system (software or usage paradigm) they originally started using is better than others.