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 BRAIN-DAMAGED [generalization of "Honeywell Brain Damage"
       (HBD), a theoretical disease invented to explain certain utter
       cretinisms in Multics] adj. Obviously wrong; cretinous; demented.
       There is an implication that the person responsible must have suffered
       brain damage, because he should have known better. Calling something
       brain-damaged is really bad; it also implies it is unusable.