The protestors chant الله أَكْبَر مرگ بر ديكتاتور, God The Greatest, Death to The Dictator.
Till Ayotallah Ali Khomeini speech on Friday where he declared the election valid
and warned of violence if demonstrations continue. Protestors flood the streets in defiance of the government and Ayotallah Ali Khomeini on Saturday, Sunday, and Monday, chanting death to the dictator. The majority analyzed death to dictator as death to incumbent president Ahmedinajad but after Khomeini's speech it is very clear
the dictator here is Supreme Leader and the Islamic Revolution.

It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt