Arabic to English Social Sciences Slang Behavior

This a typical Iraqi colloqual expression. It means a collective robbery in the absence of law and order. The victim is normally absent, overwhelmed or in hiding. It is the sort of robbery we saw during the invasion of Iraq. The same term has different meaning in the standard Arabic dictionaries such as Al-Munjid. I am not looking for that.The term "فرهود" is probably of Persian origin.