Quorange

Word invented ad hoc whose ethereal nature requires that it expire within moments of use, lest it become a neologism, one stage of linguistic acceptance beyond.

E.g. kajillion[?] : "Far beyond simple trillions, this star is up to a kajillion light years from our solar system".

The word quorange was itself originally a quorange, its origin being as an emergency rhyming partner for orange.