通同作弊 tōngtóng zuòbì
[collude in cheating;gang up to cheat;act fraudently in collusion with sb.] 勾结起来,合伙共同舞弊
钦派大臣查办,查了出来是他画的稿,此时有口难分,不能说他不是通同作弊。——清· 南亭亭长《中国现在记》