what is "talking behind someone back" in arabic ?
eg

"the person is nice to us when we see him but talks behind our back in out absence " (backbiting)

Question

what is "talking behind someone back" in arabic ?
eg

"the person is nice to us when we see him but talks behind our back in out absence " (backbiting)

Answer

we called this : 
     غَيْبَة (n)
اغْتَابَ (V)

Answer

تكلم في ظهر الشخص 
النميمة
تكلم في غياب الشخص ودون علمه

Answer

يــغتـــآب .. الــغيبة و الــنميمة ..