According to wikipedia
The term "
spastic" describes the attribute of spasticity in types of spastic CP. In 1952 a UK charity called The Spastics Society was formed.
[49] The term "spastics" was used by the charity as a term for people with CP. The word "spaz" has since been used extensively as a general insult to disabled people, which some see as extremely offensive. It is also frequently used to insult able-bodied people when they seem overly anxious or unskilled in sports. The charity changed its name to
Scope in 1994.
[49] In the United States the word spaz has the same usage as an insult, but is not generally associated with CP.
I had no idea spaz was that offensive. Is this common knowledge?