Impossible to be both genders... trying not to unleash a whole lot of stuff here because you are my friend.
Genderfluid, transfluid, non-binary, gender-neutral, agender, bigender, genderqueer, third-gender, two-spirit, ze/hir, Mx, and intersex. Intersex is physically being both genders, like if they don't have the surgery or if some person had surgery to be both genders (68.3% sure that can be done...). The rest is when someone labels themselves as both genders. Also, I'm pretty sure I just listed several new LGBTQ+ vocabulary words for y'all. As well as Knight, even though you made the answer several months ago, please use LGBTQ+ or at least LGBT+ to include the plus sign and the rest of the acronym even if you chose not to write it out since LGBTQ+ stands for a lot of stuff.