QUACK 1 By N., Sam M.S. - 6 A slang term for anyone who represents their ability or training in a health field regarding diagnosis and treatment. Also the description of a practice with no value. QUACK 1: "In the 1800's snake oil salesmen were quacks." Related Psychology Terms Discrimination and Mental Illness in the LGBT Population Diagnosis and Treatment Planning MENTAL RETARDATION (PREVENTION, CARE, AND TREATMENT) CLINICAL PSYCHOLOGY SALESMANSHIP NATIONAL INSTITUTE OF MENTAL HEALTH (NIMII) Counselor's Role in Emergency Teams COMMUNITY PSYCHIATRY ANTISOCIAL REACTION MENTAL HEALTH AND ECONOMIC LEVEL Cite this page: N., Sam M.S., "QUACK 1," in PsychologyDictionary.org, April 28, 2013, https://psychologydictionary.org/quack-1/ (accessed June 30, 2022).