Names of things that became derogatory

Villain
Knave
Blackguard
Pagan

Butcher

Boor, originally just farmer (like Dutch “Boer”).
Varlet, originally just a male servant.
Wench, originally just a female servant.

Cleveland?

The Browns :wink:

How about Mickey Mouse as a verb?

Silly, of all things:

The opposite happened with Nice

My HS English teacher insisted that we not use nice too much, and that we were using it in the wrong way. Now we know.

Anything for which there’s been a euphemism treadmill.

Spam.

Bitch was originally a term for a female dog. DO NOT USE IT TODAY in any context.

bitch!

How about “gay”?

I never saw a true gay bitch,
I’ve never asked to see one.
But save your feathers and your pitch,
None posting here could be one!

Cretin. (Orginally meant Christian)

“Yid” is a transliteration of the Yiddish word for “Jew” and is obviously not derogatory in Yiddish. But it’s considered a slur (though a minor one) in English, especially when used by non-Jews.

Uncle Tom: in the original novel, a deeply religious pacifist who refuses to repay violence with violence. In later usage, a servile co-dependent of white oppression.

Queer originally met strange. Queer Nation aside, many people still consider it a insult.

High Maintenance.

Used to be, if you had a car that was high maintenance, it was because it was an expensive, fancy sports car and it cost a lot to keep it running. The good thing was, so long as you kept it up, it was a hell of a car.

Nowadays, High Maintenance (as applied to girlfriends)? Not so good.

Also awful, which originally meant “inspiring awe,” and artificial, which meant “artful.”

The story that a British monarch referred to St. Paul’s cathedral as “amusing, awful, and artificial,” and meant it as a compliment, is mainly apocryphal, although the “artificial” part seems to be true.

In Australia, the term ‘average’ when used to describe certain things is somewhat derogatory.

It maintains its original meaning in dedicated statistical discussion only.

If you say ‘The rainfall for the month was about average’ it means exactly what you say - there are numbers involved

However, ‘The weather had been a bit average last month’ means something different.