too big for your britches

US /tuː bɪɡ fɔːr jʊər ˈbrɪtʃɪz/
UK /tuː bɪɡ fɔːr jʊər ˈbrɪtʃɪz/
"too big for your britches" picture
1.

burnu havada olmak, kendini beğenmiş, küstah

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.
O terfiyi aldığından beri burnu havada geziyor.
Don't get too big for your britches just because you won one game.
Sadece bir oyun kazandın diye burnun havaya kalkmasın.