Hugiantic
(Adj.) 1. Humongoloid, large, big, massive, enormous, gargantuan, colossal. 2. The fusion of huge and gigantic into an onomatopoeia-cally expression of “OMG! That is sooooo totally huge and gigantic beyond all belief.”
That slab of chocolate cake is so hugiantic that I'm going to end up with ka-tonk-ka thighs just thinking about it.