Abrosexual refers to an individual who's sexuality is changing or is fluid. The fluctuations might be erratic or regular. While it is normal for people to change their sexual identity through their life an abrosexual person's sexuality may change more frequently, over the course of hours, days, months, or years, as such abrosexual people may not feel compelled to seek out a relationship. For example, someone could be gay one day, then be asexual the next.
The timing of the fluctuations is different for every person, for some the fluctuations may be erratic and for others they may be regular. The sexualities that they may fluctuate between also vary from person to person. Some abrosexual people may be fluid between all sexualities, other may be fluid between a few.
Abrosexuality is sometimes considered part of the asexual spectrum, as an abrosexual person might sometimes be a-spec, although they might be most commonly allosexual.