I won't keep you in suspense, Colhad - I'm not going to accept these suggestions. But they have led me to some interesting information. So, it looks like you're not a moron after all.
And since one of my best friends is called Neville, I should say at the outset that this website does not approve of stereotyping people according to their names. However, what we're interested in here is which words actually exist in the English language, regardless of whether we approve of people using them.
I can't find
Nigel or
Neville as a form of insult in any standard dictionary, but
Cassell's Dictionary of Slang has the following entries:
Neville Nobody n. [1990s+] (Aus.) an insignificant individual.
nigel n. [1990s+] (Aus.) a friendless male. [proper name Nigel seen as quintessentially upper-class and vapid]
It's interesting that both are identified as Australian. I don't think I'd ever heard either of them, but obviously you have, Colhad.
The more promising possibility for a Chi word would be
nigel, since it has no capital letter, and it's not part of a phrase.
I could find a few examples of the word being used in something like this way. In
http://www.victoria.ac.nz/psyc/about/docs/psychobabble%2007/5-10-07.pdf, there is, "Don’t be a nigel. Get to know staff and students in the School." This is not actually Australian. It's from a newsletter called
Psychobabble, which appears to be published by the School of Psychology at a New Zealand University. (Obviously these members of a caring profession don't have the same scruples about stereotypes that I do.)
And there's a
forum post saying, "...I was going to look like a real nigel going on my own." This was from a woman in northern Tasmania.
And a South African woman named Nikki Steele writes in the
journal of a South American trip, "...I don't have to hang around in some hotel room like a real Nigel."
Based on this tiny sample, it seems the word is not restricted to males, as stated in the definition quoted above. And it seems to be now used beyond the shores of Australia, though it may have started here.
But anyhow, I'm not convinced that
nigel is widely enough used, at this stage, to justify acceptance into our list. And the same applies - probably even more so - to
neville. But thanks for raising the question, Colhad - I learnt something new.