.Used to describe a human of lesser intelligence jerking its body and having an eppileptic fit of some sort.
.Or for girls as a way to say they are turned on
usually acompagnied by the sounds "vvvvvvvvvvvvsldjglhxg" or gasps
zippy:"omg look at pete wentz drinming that potion *spazzy fit*"
gemma: OMG HE's GASPING!!! *spazzzzyyyyyyy*