背地

dāng miàn zhí yán bù yào bèi dì dí gu

当面直言，不要背地嘀咕。

Say it to his face, not behind his back.

tā qī zi fā xiàn tā bèi dì li yǒu gè nǚ ren

他妻子发现他背地里有个女人。

His wife discovered that he had a woman on the side.