【说长道短】〖shu cháng dào dun〗[indulge in idle gossip; backbite people; gossip about people behind their backs; gossip idly]

说是弄非混黑白，

长谈阔论议好坏。

道谋筑室缺自主，

短见薄识塌嘴歪。

议论别人的好坏是非。Discussion others of good bad right wrong.同：说三道四、议论纷纷。反：守口如瓶、一言不发。歇：鞋店里试脚。谜：天涯若比邻。