To /u/Curveygirly31: While I'm pointing out the atrocious failure at being "grammar police" on the part of who I'm replying to, I'm only doing so because I abhor "grammar police" who get the most basic concepts so very wrong.

Transgendered Young Adults is the right format for the words, but as you can kind of tell from the person I'm replying to, not all transgendered folk care for the phrase. Some of us don't mind, but others do. Another debated, yet QUITE common saying is 'passing', which can be taken as either a complement that your appearance is on point, or a slander that you're never really going to be the gender you're transitioning towards.

Whatever you do, show support, but don't be too terribly taken aback if a few in the group start correcting you different ways or saying confusing things. Especially where feelings can be hurt, there is no truly right way, and you're bound to offend someone at some point.

Ask for genders, and do your best to get them right. It's a sign you care. Really try not to slip, but if it's a crowd to remember, and you're otherwise supportive, they should help nudge you when needed. Most of us can tell the difference between honest mistake and blatant disregard.

Now, for /u/Magic_Made_to_Order:

gendered
[jen-derd]

adjective
1. characteristic of, suited to, or biased toward one gender : gendered diapers.

Transgendered is an adjective that means, colloquially, characteristic of, suited to, or biased towards a gender other than your birth gender.

I am transgendered. - The verb here is 'am', transgendered is an adjective acting on 'I'.

They are transgendered. - The verb here is 'are' and transgendered is acting on 'they'

Transgendered Young Adults - The term transgendered is being used as an adjective acting on 'young adults'.

Now, to show what it looks like when used as a verb. :)

The doctor transgendered the woman through SRS.

Look at this and see how wrong this sounds, this is 'transgendered' being the verb. Saying not to use it as a verb, when it's not being used as a verb, is as bad as the people who claim 'they' cannot be singular.

Just because a word ends in '-ed' does not mean it's always a past participle of a verb. It's common, sure, but not always the case. I'm sure you may be confused, shocked, or even disgusted that both adjectives end in '-ed' or even -gasp- '-ing'? It is shocking, isn't it?

^{What parts of speech are what there?}

To others: Yes, I'm skipping a lot of nuances, I'm trying to give the basics about the primary concepts of verb versus adjective. For me, it's the dark hours of the morning, and I'm tired.