This is a list of the uses of the word at my school, which are probably local phenomenom, and aren't used very many other places
Also a person who angers very quickly at stupid things... For instance, someone who freaks out if someone chants their name, could be called a spaz. If "joe" goes crazy and starts hitting "Bob", Bob might call Joe a spaz.
It is also a verb: to spaz. For instance :Joe Spazzed at Bob today in math.
It can also be a noun: Joe had a spaz in Math
Finally, it can be transformed into an adjective: "spaztic" or "spastic".
Sometimes, it's also an adverb, as in "you walk spaztically", meaning when you're walking, it looks like you're having spasms.