Could be the most offensive yet least broadcast word because there's no get out clauses for using spastic as an insult.
Minds gone blank trying to think of other medical terms which got corrupted.
Let me help you there.
Moron. Moron is a term once used in psychology and psychiatry to denote mild intellectual disability. The term was closely tied with the American eugenics movement. Once the term became popularized, it fell out of use by the psychological community, as it was used more commonly as an insult than as a psychological term. It is similar to imbecile and idiot.
Imbecile. The term imbecile was once used by psychiatrists to denote a category of people with moderate to severe intellectual disability, as well as a type of criminal. The word arises from the Latin word imbecillus, meaning weak, or weak-minded. It included people with an IQ of 26–50, between "idiot" (IQ of 0–25) and "moron" (IQ of 51–70).
Idiot. This was formerly a legal and psychiatric category of profound intellectual disability, where a person's mental age is two years or less, and he or she cannot guard himself or herself against common physical dangers.
Cretin. Cretinism is a condition of severely stunted physical and mental growth.
Retard. The word retard was widely accepted in the late-1900s to refer to people with mental disabilities; however it is now more commonly used as an insult. The word has gained notoriety for causing a growing number of mentally disabled people to feel unfairly stereotyped.
However, far from old fashioned, I'm almost certain these words are still in daily use.
