What about getting Proneologiferous?
You invent a word using, mainly, common Greek or Latin affixes, and let the others guess what it might be.
Proneologiferous should be one good example :
• Pro = before;
• neo = new;
• logi = from logo = Pertaining to a word or to the act of speech;
• ferous = producing the specified material;
So, to be "proneologiferous" could mean "to invent a word hoping that it will eventually become a neologism".
I am not completely satisfied with the -ferous suffix, because it implies the production of a "physical" material (Nectar, metals...).
Someone could suggest a better option...
Anyway, my friend suffers from "haemolalia
". What do you think this is?
(A good way to be sure you're "proneologiferating" is when Go(d)gle itself returns no results to your inventions, and, at best, makes a close suggestion, in my case it was "hemofilia"... bang!)