A transgender individual may have characteristics that are normally associated with a particular gender and identify elsewhere on the traditional gender continuum, or exist outside of it as other, agender, gender-neutral, genderqueer, non-binary, third gender, etc.
Transgender people may also identify as bigender, pangender, or along several places on either the traditional transgender continuum or the more encompassing continuums that have been developed in response to recent, significantly more detailed studies.
Furthermore, many transgender people experience a period of identity development that includes better understanding one's self-image, self-reflection, and self-expression.
More specifically, the degree to which individuals feel genuine, authentic, and comfortable within their external appearance and accept their genuine identity is referred to as transgender congruence.
That looks like a copy and paste. But now I am interested whats a "pangender"?
Would it be a crime if I say "Sir" if the transgender wants to be known as a female? Wonder if that will ever come about.
Pangender is pretty much "Fuck it all, I'm everything, even genders we don't know exist yet". Or for the technical definition:
Pangender (and/or Omnigender) is a non-binary gender experience which refers to a wide multiplicity of genders that can (or not) tend to the infinite (meaning that this experience can go beyond the current knowledge of genders). This experience can be either simultaneously or over time.
Being pangender does not require that one knows everything about all the established genders nowadays; being pangender goes beyond the known genders. Pangender can express gender fluidity or not; for example, a pangender person can manifest a genderflux, flowing from pangender to agender.
Panflux is a gender identity consisting of pangender + genderflux.
Pangender = binary genders (100% female and 100% male) + known genders + unknown genders.
Is it a crime to misgender somebody? No, and it never will be (hopefully). Is it dickish? Yes, but that's your right as long as it's only words and nobody gets physical.