self important
/ˌsɛlf ɪmˈpɔːrtənt/
adjective
- Having an exaggerated sense of one's own importance or value; arrogant and conceited.
- The self-important manager refused to listen to suggestions from junior staff.
- His self-important attitude annoyed everyone in the meeting.
- She gave a self-important speech about her achievements, ignoring the team's contributions.