Trans Memes

Regardless of what you identify, that is a whole other thing, the human body is quite binary (except from very few anomalies)

"The human body is binary, except when it's not binary"

a subclass within a grammatical class (such as noun, pronoun, adjective, or verb) of a language that is partly arbitrary but also partly based on distinguishable characteristics (such as shape, social rank, manner of existence, or sex) and that determines agreement with and selection of other words or grammatical forms

Note that the definition says that biology informs, but does not define, gender. In fact, arbitrary is part of the definition. Further, dictionaries give us introductions to words, not a concrete and unchanging lexigraphical mandate

Gender != sex. It's ok, thinking can be difficult.

gender noun
OPAL WOPAL S
/ˈdʒendə(r)/
/ˈdʒendər/
​> [uncountable, countable] the fact of being male or female, especially when considered with reference to social and cultural differences, rather than differences in biology; members of a particular gender as a group

https://www.oxfordlearnersdictionaries.com/definition/english/gender

gender
noun
uk /ˈdʒen.dər/ us /ˈdʒen.dɚ/
gender noun (PEOPLE)
a group of people in a society who share particular qualities or ways of behaving which that society associates with being male, female, or another identity

https://dictionary.cambridge.org/dictionary/english/gender

... In this dichotomy, the terms male and female relate only to biological forms (sex), while the terms masculine/masculinity, feminine/femininity, woman/girl, and man/boy relate only to psychological and sociocultural traits (gender). This delineation also tends to be observed in technical and medical contexts, with the term sex referring to biological forms in such phrases as sex hormones, sex organs, and biological sex

https://www.merriam-webster.com/dictionary/gender