too big for your britches
US /tuː bɪɡ fɔːr jʊər ˈbrɪtʃɪz/
UK /tuː bɪɡ fɔːr jʊər ˈbrɪtʃɪz/
1.
montarsi la testa, darsi delle arie, essere arrogante
acting in a way that shows you think you are more important or capable than you really are; arrogant or conceited
:
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Ever since he got that promotion, he's been acting too big for his britches.
Da quando ha ottenuto quella promozione, si è comportato come se fosse troppo grande per i suoi calzoni.
•
Don't get too big for your britches just because you won one game.
Non montarti la testa solo perché hai vinto una partita.