It just means "different to other people" - which we should all aspire to be.

It's a catch all term for people with for example dyslexia, autism, ADHD and so on

Neurodivergent is a nonmedical term that describes people whose brains develop or work differently for some reason. This means the person has different strengths and struggles from people whose brains develop or work more typically. While some people who are neurodivergent have medical conditions, it also happens to people where a medical condition or diagnosis hasn’t been identified. I think nonmedicl term gives the game aeay.

This might help.

https://www.rcn.org.uk/get-help/member-support-services/peer-support-services/neurodiversity-guidance/what-is-neurodiversity

medical

I'm neurotypical, apparently, but I object to being labelled that just as I object to CIS.

Another label somebody can pin on themselves so they can feel special.

Around one in seven people are 'neurodivergent' (which is the opposite of 'neurotypical'):
https://www.hee.nhs.uk/our-work/pharmacy/transforming/initial/foundation/resources/edi/neurodiversity

I'm neurodivergent (as I'm on the autism spectrum), as are many of my friends (who either are also on the autism spectrum or who have ADHD).

When I was teaching maths, I encountered many students with dyscalculia or ADHD.  However most of those that I'm still in touch with seem to be those who, like me, have high-functioning autism.

According to that link I would definitely be labelled neurodivergent if I were today as I would be diagnosed  dyscalculia. I had dreadful problems with maths as all the numbers in a sequence jumped about.

They still do but I've learned to manage it 

Was you diagnosed as a child, Buen? My nephew was sent to a 'special' boarding school 60 years ago as he was misdiagnosed

Everyone who isn't neurodivergent is neurotypical, Naomi. You could be right - I might believe I don't have a condition, problem, disorder but that doesn't mean I'm right. You might think differently 😁

As I said, I object to these labels. 

If I had a specific condition like autism, I'd say I was autistic, not neurodivergent.

I also object to COPD, which seems to be an umbrella term for emphysema and chronic bronchitis. They are not the same.

Is 'trendyness' so bad?

Trendy is fine when it's applied to fashion, music. 

Is it "trendy"? The term came into being in the 1980s/90s.

Is 'trendyness' so bad? if it stops independence of thought you just become another useful idiot.

Trendy isn't independence of thought, though.  It's become trendy because so many people have followed the leader, like sheep