I have seen some references up above, but I’m going to spell this out. I get my info on these things from my daughter, who has many friends who are gender nonbinary, gay, asexual, transgender, basically the gamut of gender and sexual identification.
Feel free if you are from this community to correct me on my info as I am an old person who grew up before people could even be openly out of the closet in high school, and I need lots of schooling.
But, for people who are want to identify as neither a she nor a he, they want to use “they.” One of my daughter’s friends has recently chosen this as their preferred pronoun. I’m sure it’s not totally a new thing but it’s a new to me thing, and I think a thing that is starting to get wider play.
I’m glad to see the dictionary hopping on the trend.