I actually looked into this two days ago. I came across a PDF that was maybe six years old but already outdated. It's a problem when it's this difficult to keep up. I know it's a problem to not try to keep up too though. The human condition sucks.

I tried to look but the most official one (from University of Washington) is kind of ridiculous. Following for better ideas.

where does everyone stand on cretin? IMHO it's medical use is obsolete afaik, so really it's just an insult right?

https://en.wiktionary.org/wiki/Category:English_derogatory_terms

https://en.wiktionary.org/wiki/Category:English_offensive_terms

these aren't phrases but they're words

This is a great list for ableist terms . https://www.autistichoya.com/p/ableist-words-and-terms-to-avoid.html I'm disabled in multiple ways and there were a few on here that caused me to re-evaluate my lexicon.

A list has limited use because language evolves, and so do people, and on top of that, context is everything — but it can be a good place to start

For years I used the term "shylock" as a pejorative for greedy people while being ignorant of the connotations of using the characters name that way. I didn't even know it was from a Shakespeare play.

Unfortunately, this keeps changing. Old slurs get recycled or forgotten, and new words become offensive. Corporate guidelines are often hugely overbroad to avoid offending anyone. The best way to avoid things like what just happened, by checking slang in a dictionary before using it.

Cunt