egotistic

1. ADJ Someone who is egotistic or egotistical behaves selfishly and thinks they are more important than other people. 利己主義的; 自我中心的[表不滿]

Susan and Deborah share an intensely selfish, egotistic streak. 囌珊和黛博拉兩個人都十分自私，以自我爲中心。