self-important

This term carries a strong negative connotation, describing a personality trait where an individual overestimates their own status or influence. It suggests a lack of self-awareness, as the person believes they are more significant than others perceive them to be. It is frequently used to describe people in positions of minor authority who behave as if they hold absolute power.

In social contexts, the word implies a certain stiffness or pomposity. While a person who is confident is seen as positive, someone who is self-important is viewed as irritating or arrogant because their perceived value is not supported by reality or merit.