The assistant manager was a self-important fellow who strutted about the office barking instructions.
disapproval If you say that someone is self-important, you disapprove of them because they behave as if they are more important than they really are. He was self-important, vain and ignorant. = pompous + self-importance self-importance Many visitors complained of his bad manners and self-importance. behaving in a way that shows you think you are more important than other people - used to show disapproval
having or showing feelings of unwarranted importance out of overbearing pride; "an arrogant official"; "arrogant claims"; "chesty as a peacock"