Some people look lost? I am not sure what facial expression would convey that, and if there is a possibility of having them unconsciously, but on a similar note

Some people look lost? I am not sure what facial expression would convey that, and if there is a possibility of having them unconsciously, but on a similar note had a roommate who used to always have blood shot eyes, and a perpetual expression of looking drunk. He was a teetotaler. He complained quite frequently about being asked if he had drunk a lot last night.