A compound of the word
skint, adjective, and an artificial suffix -tastic, as used in the word
fantastic which has a Greek root. Linguists call this kind of phenomenon a back formation. Cf. pea from pease.
Possibly influenced by the tendency to emphasise the word
fantastic in spoken English by pausing after the first syllable.
"I can't come out for a drink this evening as I'm skint-tastic. I don't get paid until next week."
