党同伐异 dǎngtóng-fáyì[defend those who being to one's own faction and attak those who don't;unite only with those of the same ideas and attack the others] 拉帮结派,偏袒同党,攻击异己原指学术上的派别之间Hao86.com的斗争,后泛指一切集团之间的斗争党同伐异,此姘彼丑。