To say that something was over the top awesome; to compliment someone on their awesome moments or themselves; The way of explaining uber-awesomeness (Adjective)
"Dude, you are Supertastical"
"That was a Supertastical Killionaire!"
"This is way Supertastical!"
"She is gorgeous I want to take her for a devonshire tea then give her a kiss, a rose and a butterfly", "yeah bro that's superstickshift witchcraft you should butter that bitches bread".