Both words describe two facts held together. Something in your gender is fixed and has never seriously been in doubt. Something next to it moves. The difference is the kind of movement. Switching stations is fluid. Turning the dial is flux.
This is the most argued-over line in the whole area, so treat any confident answer with suspicion, including this one. Both words are young and small, with no agreed definition, and some people use them interchangeably and will tell you so. Read for the shape, not the vocabulary. If the shape fits and the word does not, keep the shape.
How to tell them apart
- Name the moving part on two different weeks. If it was a different gender each time, that is fluid. If it was the same thing at a different strength, that is flux.
- Check whether it ever goes quiet. Flux drops towards faint or nothing and climbs back. Fluid goes somewhere else rather than nowhere.
- Ask whether the fixed part was ever whole. In demiflux the stable part was never a whole gender to begin with. In demifluid an anchor of woman or man is argued over — some people use it that way, others would send you elsewhere.
More likely Demifluid
- You have given two different answers on two different forms, months apart, and neither one was a lie.
- One item of clothing is non-negotiable; everything else in the wardrobe rotates and you barely notice it happening.
- You tried calling yourself genderfluid — roomy, but it implied the whole thing was up for grabs, and it is not.
More likely Demiflux
- You read the demiboy or demigirl page and thought: yes, but not always this much.
- There is a floor and a ceiling: something is always left on the emptiest day, and even at full strength you are partly it, never wholly.
- The same word — sir, love, mate, your own name — lands right on Tuesday and wrong on Thursday, and it is the same word both days.
When both words are honestly available
- Some people use both words for the same experience, and say so. If both fit, pick whichever you can say out loud without flinching.
- Possible in principle: a fixed part, and a moving part that changes both what it is and how loud it is. At that point genderfluid or genderflux may be shorter words people already recognise.
What people get wrong
One of them is the correct word and the other is a misuse.
There is no authority. Both pages say the line is contested and that you can find two confident, contradictory definitions in the same afternoon.
Demi means half, so the fixed part must be exactly fifty per cent.
Nobody is measuring. The fixed part might be most of it with a small corner that swings, or a small hard core with a lot of weather around it.
Questions people ask
- What is the difference between demifluid and demiflux?
- Both have one part that stays put and one part that moves. In demifluid the moving part changes which gender it is — non-binary this week, something else next. In demiflux it changes how much: same gender, different volume. Some people use both words for the same experience, and there is no body that decides.
- How do I tell whether my gender is changing or it is just my mood?
- Write it down for a month. Two numbers a day: where the gender sat, and how the day went. If they rise and fall together every single time, mood is doing the work. If you get strong gender in an awful week and flatness in a lovely one, it is running on its own clock. This costs nothing and settles more than any page can.