A latmiyat (Sometimes spelled latmiya, latmya, latmaya, or latmia) is an Islamic lamentation or eulogy. It is to express the
sad emotion through poetry and of the chest beating.
Clapping is a sign of joy and the thumping of the chest is a sign of
sadness. Muslims remember what happened to Imam Hussain and the sacrifice he has given for his lord 1400 years ago.