言霊
Although Wikipedia has an entire article on wasei Eigo, the opposite (which is more significant to English-speakers) is not discussed in a centralized place. Some of them are included in this really long list, but it doesn't mention the one that I find most dangerous. This is noted briefly, however, in the article I've been avoiding, but they don't say anything about the actual movement; it's implied that it's just an insult.
Also significantly, it says that Japanese lesbians refer to themselves as "les." I'd heard that this was a pejorative, which is presumably why I have never seen it used self-referentially in lesbian media, only in yuri. I have something more to mention related to that in relation to another kansō, if I ever get around to it.