moron

noun3

1. •
   (informal, offensive) a person who says or does very stupid things

   • “I misjudged you,” Harvey said. You’re not a moron. You’re only a case of arrested development. — 1926
2. •
   (old-fashioned) A person of mild mental subnormality in the former classification of mental retardation, having an intelligence quotient of 50–70.
3. •
   A hypothetical particle whose existence and configuration can make a moral judgment true.