Oh no, Iâm going to nerd out for a minute here. (You had no way of knowing what horror you would unleash...)
There is indeed a linguistic term for this - there are three, actually! Some linguists will call it semantic pejoration, degeneration, or deterioration. The positive equivalent is called semantic amelioration or elevation. Itâs part of semantic change, and itâs really fascinating.
Discussion of meaning in linguistic semantics involves connotation, like you mention, and denotation, which is closer to the âdictionary definitionâ of a word or phrase. (Itâs a bit more complicated than that, because different fields of linguistics use those terms slightly differently and even within a single field itâs still not possible to declare a firm boundary between the two that will always apply. Theyâre not two discrete phenomena but more like a spectrum.) Thereâs a bit of debate over whether these should be considered types of semantic change or effects of semantic change, but theyâre definitely recognised as something that occurs. So in your example, thereâs been a change in connotation from positive or at least neutral to negative, and itâs a really strong one. To the point where thereâs been a change in the denotation as well by this point in time, because itâs gone from just being about someone who is of a higher status to also potentially being about someone who thinks they are of a higher status and is acting like a dick about it, basically. The connotation change is still noticeable on its own, though, because you can still use the word in the exact same literal context and the negative associations are going to be present anyway. Iâd be really interested in finding out which change came first, if they didnât happen at exactly the same time, because either one could have lead to the other.
A lot of examples of pejoration and amelioration are way more transformative than this one. For instance, âknaveâ used to mean âboyâ and then âservantâ before it reached its current meaning of a nasty and sometimes deceitful man. And âhussyâ used to just mean âhousewifeâ! But it started being used as a general term for women, and then as a negative one, until we get to where we are today. On the other hand, saying someone was âniceâ would once have been calling them ignorant and stupid.
As for examples where the change is still mostly in the realm of connotation and the denotation remains very similar, there are a few of those too. If we look at words like âgeekâ and ânerd" from when they started being used to refer to someone who has niche and specialised interests (rather than the performer variant for âgeekâ and so on) we see that it still has very much the same denotation, but the connotations have gone from being exclusively negative to potentially neutral or positive as well.
Itâs harder to find examples where only the connotation has changed, because if a change in connotation is widespread enough to be recognised as having happened, itâs often going to continue spreading until itâs so well-established that it effectively becomes a new denotation too. Sometimes it even eclipses the old meaning entirely. So words where weâve only seen a change in connotations so far might well end up changing much further within the next few decades, even!
Amelioration has some things in common with the concept of semantic bleaching. (Thatâs a process involved in grammaticalisation in which words cease being used for their original semantic content and become function words, often losing that semantic content altogether.) Or I guess another way of saying it is that semantic bleaching often involves amelioration just by virtue of it removing a negative connotation, even when it doesnât replace it with any other connotation. Thatâs how you get intensifiers like âterribly,â âawfully,â âbloody,â and so on.
ANYWAY THAT WAS ME BEING A BIG NERD FOR A BIT which is obviously so different from normal BUT I JUST THINK ITâS COOL OKAY. At least this should give you some keywords to google if you want to look into it in more detail!