Absorgender is a gender in which one absorbs the genders of the people around them. As one is around more people more genders are added to the genders one feels, even after the people leave one still feels their gender. These genders remain until one hits a 'max', at which point they become a blank slate, and revert to a single 'base gender'. This base gender can be any gender, including agender. For some people this 'base gender' may be different each time.
If one absorbs a particular gender more easily than other genders, one can use absor- as a modifier for that gender. For example, absorgirl, absornonbinary, absordemiboy, etc.