I wouldn't be surprised if it's actually an abbreviation of "engine-x", but I can't find any better source that explains how they came up with the name. Still, this source pretty much implies it.
> I was told that N-ginx is a curse word in Chinese
Don't know that many swear words in Chinese, but I know that that "ginks" isn't really pronouncable in Chinese. You could do "ging", but the "k" and the "s" would then need to be separate syllables; the best you could get is "en ging ke se", which isn't really close enough to "N-ginks" to be dangerous.
(Similarly, "golf" ends up as three syllables: "gao er fu", plus "qiu" added to the end to clarify that it's a game involving a ball.)
