ego trip 自我表现 ; 自我满足的行为，on an ego trip字面含义在自我表现里，这不就是自吹自擂、自命不凡的意思了么。

【例句】
She has been on an ego trip since she sang on television.
她上电视台唱过歌之后就一直自吹自擂。

Any corporate chairman who appears in his company's ads has got to be on an ego trip.
任何一家公司的董事长亲自出马担任电视广告片的主角，一定是一位很想出风头的人。