@Ced Cis is just short for cisgender. If the term trans isn't offensive (which it's not btw), then cis isn't offensive either. There's not really trend other than that to describe someone who's not trans without it being long or actually offensive (ex: normal)
@Asi I understand that a trans-woman is a trans-woman, and a biological woman is a woman. Cisgender is a controversial topic whether one wants to be called that or not, which is what I was pointing out. I'm not trying to offend anyone or anythin