The discussion about words that are okay to use here needs to be summed up and made clear for those who don't completely understand it or choose to ignore it. Anyone who feels that we're beating a dead horse is welcome to that opinion, but this still applies to you.
As you may have noticed, when it comes to common, expressive language, we don't care what kind of language you use. We don't give a shit, I might say by way of example.
However...
No matter how old, conservative, or "set in your ways" you may be, you may not come in here and insult or degrade anyone with insensitive or intentionally provocative language.
I'm talking about protected classes or protected groups or whatever term you want to apply. If those terms trigger you, the way politically correct apparently might, you'll have to work out your feelings about that elsewhere.
Included in those protected classes are mental disabilities. That means we don't allow the use of insensitive or intentionally provocative language to talk about people with mental disabilities here.
Other groups you may not use insensitive or intentionally provocative language to discuss are racial groups, religious groups, people of other nationalities or ancestries, queer people, people who don't conform to your preferred gender "norms," people with physical disabilities, people whose citizenship may be unknown, etc.
You get the picture.
If you simply can't survive in the world without continuing to insult and demean people with backward terminology, you're not going to be welcome here.
I'll be happy to clarify or explain anything I've said to anyone who doesn't understand any part of it. But I know that everyone reading this knows what I'm saying. And let me reiterate what Artyczar said, this is not up for debate.
