Hemigenderflux is a gender identity in which one's gender fluctuates between 0% and 50% present.
Related identities include hemigender, genderflux, demigender, and demiflux.
Heminonbinaryflux, or hemienbyflux, is a gender identity in which one fluctuates between 0% and 50% nonbinary/androgynous/neutral.
Related identities include heminonbinary, genderflux, enbyflux, demigender, deminonbinary, and demiflux.
The male/masculine version is hemiboyflux. The female/feminine version is hemigirlflux.