Spaz

If you completely go off on someone as in like stand up for what you know is right regardless of any consequence.

Homedude just spazzed on those people; like he could care less what they were packing.

fat spaz

Somebody who is largely overweight and is dopey

'Look at that fat spaz'

Spaz-type

when one needs to sound exited but lacks the ability to do so, such as during an internet conversation. It is accomplished by "spazzing" all over you keboard.

some examples would be:
"adsgfahsgdsadff"
"opdfkmkocpdsf"
"bjuvnvcjkxskfd"

..and so forth.

Dude1: man, I just accomplished (insert lifelong-dream here), i was all like "sahjdksahjsajkhsd"
Dude2: from the looks of that spaz-type, it was pretty exiting.