Aroallo-unsure is someone who doesn't know if they are aromantic or alloromantic. This term could be used to describe someone who is questioning their romantic orientation, or it could just be someone who is always unsure in whether they feel romantic attraction.
The sexual equivalent it aceallo-unsure.
The left half of the flag is the colors of the aromantic flag, while the right half of the flag is the colors of the allosexual flag. In the center is a question mark, which indicates that the person is questioning between the two.