Unpredictability, Irritability, Defiance, and Impatience signify the Petulant Borderline. They tend to be stubborn, pessimistic, and resentful as well. They teeter between feelings of being unworthy and feelings of anger. They can explode with feelings of anger and even rage. They fear disappointment from others but cannot seem to help wanting to rely on them. They can be passive-aggressive and show self harm as a way to get attention. To put in simple terms petulant means child-like.