Ah. Okay. I'm not sure I think that's a reliable definition, because it doesn't match up with what I found anywhere else (I did see some with "idiot" in them but it was clearly not the, uh, clinical sense of the word) but it's good to know where that came from anyway.

(This is not to say I'm dismissing the concern because of the dictionary definition and etymology -- the important thing is, of course, not hurting people. I just wanted to know if there were some kind of ugly history to the term that I wasn't aware of because I'm a geek.)