Punk-derived music that generall incorporates lots of time and tempo changes(imparting the "spastic" quality reffered to in the name). Skram, Prog, Metal, Free Jazz, and Grindcore are all (to varying extents) antecedant to it in terms of their influence. Spazzcore is often, while ostensibly chaotic, very demanding in terms of precision and physical endurance. The term was first applied to Frodus and Shelby Cinca is generally credited as the inventor of the term (which was originally inteded as an expiriment in marketing). Since the introduction of the term, however, it has taken on a life of it's own outside of it's original application.
BETTER KNOWN EXAMPLES OF SPAZZCORE
Dillinger Escape Plan
Type of hardcore where the tempo changes sporadically. And the singers usually don't sound like humans.
"It's not shit! It's SpazzXcore!"
A form of music in the loosest sense of the word. Usually performed by toffy rich kids in an attempt to annoy their parents into giving them more pocket money or a new pony.
"lets play spazzcore Jeremy, it'll make people think we're intellectuals"
music genre for the mentally challenged
circle takes the square