Someone who is egotistical has incredibly high confidence in themselves. They often tend to be very pretentious and arrogant. They tend to be disliked by their peers.
Thomas: I was one of three trumpets accepted into Northwestern's School of Music
Derek: With credentials like that, what fantastic job do you have?
Thomas: I was the director of a very fine group back in Wassau, Wisconsin and forever changed the direction their program. After that, I directed THE Eagan High School Wind Ensemble, and THE Eden Prarie Community Band. Both of which are better than most, if not all college bands.
Jeff: Wow! How do those ensembles do in competition?
Thomas: I don't need a judge to tell me how good my ensembles are!
Conrad: Shut up Tom! Why must you be so egotistical?