too clever by half
过于聪明反而给人以不好的印象或引起麻烦
口语·书面·批评聪明反被聪明误
英文释义
to be excessively or arrogantly clever, leading to negative consequences
例句
His plan was too clever by half and ended up backfiring.
典故来源
源自19世纪英国，half表示程度，意为聪明过头反而带来负面效果。