That is a statement that threatens violence and murder if they do not get their way. It started during the Rodney King riot, and Maxine "Kerosene" Waters led the mobs in that chant.
She should have been arrested for inciting riots, but she wasn't.
Maxine Kerosene evokes that classic Fred Sanford line:
“I’d like to push your face into some dough, and make me some gorilla cookies!”