too big for one's britches
成語所屬單字britches
too big for one's britches — 慣用語
1. behaving as though you are more important or capable than you really are
1.慣用語
釋義
自以為是；自視過高
behaving as though you are more important or capable than you really are
例句
Since getting promoted, Ziad has been too big for his britches — he barely speaks to us.
Ayesha told her son he was too big for his britches after he refused to help with the dishes.