swelled head

US /swɛld hɛd/
UK /swɛld hɛd/
"swelled head" picture
1.

得意忘形, 自大

a person who has an exaggerated opinion of their own importance, ability, or attractiveness

:
After winning the award, he got a bit of a swelled head.
赢得奖项后,他有点得意忘形了。
Don't let success give you a swelled head.
不要让成功让你得意忘形