Mob rule

Wiktionary Word definitions in Wiktionary
n. mob rule; government by the masses; mobocracy.

Wikipedia Word definitions in Wikipedia
Ochlocracy (, okhlokratía ; ) or mob rule is the rule of government by mob or a mass of people, or, the intimidation of legitimate authorities. As a pejorative for majoritarianism , it is akin to the Latin phrase mobile vulgus meaning "the fickle crowd", ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Ochlocracy \Och*loc"ra*cy\, n. [Gr. ?; 'o`chlos the populace, multitude + kratei^n to be strong, to rule, kra`tos strength: cf. F. ochlocratie.] A form of government by the multitude; a mobocracy; mob rule . --Hare.

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
"government by the rabble," 1580s, from French ochlocratie (1560s), from Greek okhlokratia (Polybius) "mob rule," the lowest grade of democracy, from kratos "rule, power, strength" (see -cracy ) + okhlos "mob, populace," perhaps literally "moving mass," ...