ego trip
noun [ C ] disapproving uk/ˈiː.ɡəʊ ˌtrɪp/ us/ˈiː.ɡoʊ ˌtrɪp/
自我表现；自吹自擂；出风头
something that you do because it makes you feel important and also shows other people how important you are
He was on another one of his ego trips, directing and taking the main part in a movie. 他又在大出风头了，亲自出马执导影片，并在其中扮演主要角色。