What is "pantomath"

A pantomath is a person who wants to know and knows everything. The word itself is not to be found in common online English dictionaries, the OED, dictionaries of obscure words, or dictionaries of neologisms.

Logic dictates that there are no literal nonfictional pantomaths, but the word pantomath seems to have been used to imply a polymath in a superlative sense, a ne plus ultra (nothing more beyond) as it were, one who satisfies requirements even stricter than those to be applied to the polymath. In theory, a pantomath is not to be confused with a polymath in its less strict sense, much less with the related but very different terms philomath and know-it-all.