Cis - A person who's gender matches their biological sex

Gender Fluid - A person that changes their gender depending on the day. This is a bad definition, so I advise you to look more into this

Gender Neutral - A person that does not identify with a gender. Please refer to them with they/them pronouns. These people might also go by nonbinary.

Transgender - A person who's gender has changed and no longer matches their biological sex

FTM - Female to male, when someone transitions from a woman to a transgendered man.

MTF - Male to female, or man to woman

Binder - A tool used to conceal/deplete breasts when transitioning from female to male. Always make sure to apply it carefully, and make sure the binder used is safe

Non-Op - A transgendered man/woman that has not used surgical means to change their physical sex. 

Transsexual - From my understanding, this is someone whose used surgical means to transition between genders (WARNING: This is widely considered a slur, so it'd be best not to use the term)

Sex is different than gender. Sex is male and female whereas there are many genders, a lot of which I did not cover. Comment down below any terms you may want to know. 👇