If you describe someone or their behaviour as brash, you disapprove of them because you think that they are too confident and aggressive.
例句
On stage she seems hard, brash and uncompromising.在台上她显得强硬、自负且毫不妥协。
英汉词典释义
n.
自以为是;莽撞无礼
He contrasted her brashness unfavourably with his mother’s gentleness.他把她的粗鲁同他母亲的温和相对比。The opprobrium and enmity he incurred were caused by his outspoken brashness.他招致的轻蔑和敌意是由于他出言过于粗率而造成的。