Demigirlflux is a combination of demigirl and girlflux. It's a term for when ones gender fluctuates between demigenders, but feels more of a connection to femininity. At one's most feminine, they feel like a demigirl. At one's least feminine, they feel may experience other genders.
The name may also be be interpreted as someone who is partially, but not fully girlflux.
The masculine counterpart is demiboyflux and the neutral counterpart is demigenderflux.