ego trip
US /ˈiː.ɡoʊ ˌtrɪp/
UK /ˈiː.ɡoʊ ˌtrɪp/

1.
自我膨胀, 自大
an act or period of self-indulgent behavior, often motivated by a desire to impress others or boost one's own self-importance
:
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His long speech was just an ego trip, full of self-praise.
他冗长的演讲只是一场自我膨胀,充满了自我吹嘘。
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She accused him of being on an ego trip when he insisted on taking all the credit.
当他坚持要独揽所有功劳时,她指责他是在自我膨胀。