While denankius can trace its origin to mockery of the imitation of saying de nada with an Anglo pronunciation thus producing the lexeme denankius its ramifications are yet to be explored.
Denankius occurs because we southwestern peeps try to do a reduplication, a rhyme if you will. tenkius, denankius.
Denankius arises as a silly imitation to try to be anglo-speaking as well though only to signal that the speakers is not an anglo-speaker. From a phonological perspective this is highly possible because the slide from a fricative to a velar is not hard at all.
Also notice how easy it is to apply certain anglo grammar rules to new espanglish words, de nada, two words become as a compound once the transformation has occurred.
A closer research for the post of the day provides interesting results:
Denankius in google
Post originally appeared, though under different circumstances in Xicano hasta las madres.
southwest, Lingüística, periodicos