"Glenn's got a great new word, by the way, which is kind of appropriate. Lucidiots. That's what he calls people who talk too fast, seem to be perfectly lucid -"
"-and are, in fact, idiots. I like that. Where'd he get it from?"
"It's his. He made it up. Words beget words. That's the cri du jour."
"Lucidiots," Will said again, most entertained.
So there you go. Lucidiots. Googling it throws up almost no hits at all, so it may well be a Clive Barker neologism.