According to my fixer and everything I have read online, the technical name for it is 'skunk' . The smell comes from liquid developed by the Israeli Military used to disperse protesters and crowds. Israeli Defence Forces (IDF) use a water cannon to spray it on people.
It sticks to clothing, skin, asphalt, buildings and makes the entire area smell like a mixture of rotting corpses and mounds of human waste. I know that for a fact. I have smelled both.
The real punishment of this weapon is that the smell doesn’t wash away immediately. It lingers. It sticks to the person who was sprayed for at least a week making it easy for police or anyone else to know he/she was involved in clashes.