to behave in a way that is intended to attract attention or admiration, and that other people often find annoying

She only bought that sports car to show off and prove she could afford one. 她买那辆跑车只是为了炫耀她能买得起。

He's always showing off to his classmates. 他老是在同学面前炫耀。

to show something or someone you are proud of to other people, so that they will admire it, him, or her

She likes to wear short skirts to show off her legs. 她喜欢穿短裙以炫耀她的双腿。