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1.
Shizzletastic is a combination of the words shizzle and fantastic. It is a way of saying something is good except by saying shizzletastic it puts that thing onto a whole other level of amazingness. If something is shizzletastic it is practically god like, in fact it could probably kick gods ass by just thinking about it, thats how good it is to be shizzletastic.

Also words like shizzleistic, shizzlebombastic and shizzleicious all mean the same thing and can be used instead of shizzleistic at any time.
"I just took a massive turd, it was shizzleistic"

"I just won the lottery"
-"Thats pretty damn shizzletastic"
by Martyn S. Stewart June 14, 2006
 
2.
Shizzletastic is a combination of the words shizzle and fantastic. It is a way of saying something is good except by saying shizzletastic it puts that thing onto a whole other level of amazingness. If something is shizzletastic it is practically god like, in fact it could probably kick gods ass by just thinking about it, thats how good it is to be shizzletastic.

Also words like shizzleistic, shizzlebombastic and shizzleicious all mean the same thing and can be used instead of shizzleistic at any time.
"I just took a massive turd, it was shizzleistic"

"I just won the lottery"
-"Thats pretty damn shizzletastic"
by Martyn Stewart June 04, 2006