RationalWiki discusses a few:

Another problem of LessWrong is that its isolationism represents a self-made problem (unlike demographics). Despite intense philosophical speculation, the users tend towards a proud contempt of mainstream and ancient philosophy[39] and this then leads to them having to re-invent the wheel. When this tendency is coupled with the metaphors and parables that are central to LessWrong's attraction, it explains why they invent new terms for already existing concepts.[40] The compatibilism position on free will/determinism is called "requiredism"[41] on LessWrong, for example, and the continuum fallacy is relabeled "the fallacy of gray." The end result is a Seinfeldesque series of superfluous neologisms.

In my view, RationalWiki cherry picks certain LessWrongers to bolster their case. You can't really conclude that these people represent LessWrong as a whole. You can find plenty of discussion of the terminology issue here, for example, and the way RationalWiki presents things makes it sound like LessWrongers are ignorant. I find this sort of misrepresentation to be common at RationalWiki, unfortunately.