DSM: A taxonomical compendium of mental diseases, syndromes, and traits that are wierd or harmful enough to merit a psychologist's caring intervention. DSM is often confused with the DSM (Dimwitted Syndrome Manual), which represents a list of permutations of the metaphors which when strung together suggest nonexistent diseases, syndromes, and traits that are wierd and harmful enough to merit a psychologist's caring intervention. Depending upon your point of view (caregiver, patient, health care insurer, or sceptical web site writer), both manuals are completely interchangable.