too big for your britches
US /tuː bɪɡ fɔːr jʊər ˈbrɪtʃɪz/
UK /tuː bɪɡ fɔːr jʊər ˈbrɪtʃɪz/
1.
건방진, 자만심이 강한
acting in a way that shows you think you are more important or capable than you really are; arrogant or conceited
:
•
Ever since he got that promotion, he's been acting too big for his britches.
승진한 이후로 그는 너무 건방지게 굴고 있다.
•
Don't get too big for your britches just because you won one game.
단 한 게임 이겼다고 너무 건방지게 굴지 마.