Demiboyflux is a combination of demiboy and boyflux. It's a term for when one has some connection to maleness or masculinity, but one's gender also fluctuates. At one's most masculine, they feel like a demiboy. At one's least masculine they feel may feel like another gender.
The name may also be be interpreted as someone who is partially, but not fully boyflux.
The feminine counterpart is demigirlflux and the neutral counterpart is demigenderflux.
Huliboyflux
Huliboyflux is a subset of demiboyflux where one's connection to masculinity fluctuates, but instead of demiboy being their most masculine experience, it's their least masculine experience. Huliboyflux people fluctuate from demiboy all the way to being a full boy, but they never experience a connection to masculinity less intense than demiboy. In other words, at their most masculine, they are a full boy or very close to one, and at their least masculine they are a demiboy. They may have other genders as well.