Omnigender is a gender similar to pangender, but more specific in what it means. Pangender is when one is all genders, and doesn't care about what gender category it is. but omnigender is when one feels like all genders, but still cares about their gender. Pangender is genderblind, while omnigender is not.
It may also mean having all genders, but treating them all as one. Or having all genders, but all of which feel as though they are different in intensity. For example, feeling 40% woman. 20% man, 30% non-binary, and 10% anonbinary/xenic all at once.[1] An omnigender person may also have a preference for a gender, while still identifying to some extend with all of them.
When referring to all genders this only includes genders in one's own culture and life experience. One cannot identify as ethnic genders outside their own culture, as those gender require a connection to and knowledge of that culture, and it's impossible for one to spend their life in all cultures.
History
Omnigender was coined by victomofrebellion on Tumblr.[2]
Flag
The pride flag was created by hyaenahart on Tumblr. The color meanings 'represent the binary and all genders inbetween.'[2]