is not a word, despite the belief of John Mathews. Yes, hitherto is a word, as is fore. But when combined, the resulting preposition doesn't make sense.
John: Bret, come hithertofor!
Bret: God John, I hate when you try to make hithertofor sound like a real eloquent-sounding word even though it doesn't mean anything.
Ruler of Lake Titicaca. Rumored to have a bunghole that gets very angry if it does not receive toilet paper. Cornholio the Great is often seen walking around with his shirt over his head and his hands in the air, chanting songs about his power, and his bunghole.
"I am Cornholio! You do not want to face the wrath of my bunghole, for I need TP!"
Butthead: Shut up, Beavis! (uh huh huh huh)
Beavis: Um, okay. (heh heh heh heh).