self-important
adjective
UK/ˌself.ɪmˈpɔː.tᵊnt/
US/ˌself.ɪmˈpɔːr.tᵊnt/
Definitions of self-important adjective
Having an exaggerated sense of one's own importance or value; behaving as if one is superior to others.
The self-important manager always interrupts other people when they are talking.
His self-important attitude annoyed his colleagues.
She always speaks with a self-important tone.