In my opinion , we are still in a phase of exploration of gender identity . People read about other ' s gender identity , when it doesn ' t fit 100 % with their own , they might make a new one . For instance , two genderfluids might not have the same experience of fluidity , and each of them could coin a word for their own experience . But both are genderfluid , and finally that ' s the term that stick . To make it as simple as I could , there are male , female the binary genders , neither agender and both genderqueernon binary is when it is somewhere in between fluidity is when it changes overtime for instance agender to female and back , from twice in a second to twice in a year trans is everyone who ' s gender doesn ' t match their assigned at birth gender