I looked this up:
"Cosplay is a performance art where participants dress up as characters from various forms of media and act in character. The term is a combination of the words "costume" and "play".
So, yeah, you are good using this term. Who cares about political correctness in deviate activities anyway? Your Christmas party sounds like a jolly good time. I'm envious. Every Halloween, my Mistress does a group costume. It is usually based on gender flipping. I was Robin to her Batman with a gigantic strap on. We all went as the Scooby Doo crew last last Halloween. I has Daphne to her Fred. One of her other slaves was Scooby. They were training him with a shock collar all night. 2 women dressed up as Thelma and Shaggy. Shaggy was in drag and walking around with a fake joint. It is a nice time when we can bring vanilla tradition into our kink traditions.
