tar with the same brush
用同一把毛刷涂抹沥青
口语·反对以偏概全
英文释义
to consider or treat everyone in a particular group as having the same negative characteristics or faults
例句
Just because one politician was corrupt, don't tar them all with the same brush.
典故来源
17世纪英国用沥青刷标记羊群或惩罚罪犯，后比喻将群体一概而论。