also spazz, by 1965, U.S. teen slang, apparently a derogatory shortening of spastic. Also used as a verb.
: only the spastic twits in competition
noun[sometimes used cruelly, in reference to the plight of cerebral palsy patients exhibiting constant body spasms]
To behave or react very angrily; have kittens: She just about threw a fit when I told her we weren't going/ Well, they threw a spaz and said I can't see him or have him over (entry form 1896+, variant 1990s+)