ochlocracy
Mob rule; government by the masses; mobocracy.
countable, uncountable
Referendums are snapshots of sentiment at a given point in time. Government by referendum is government by crowd acclamation: not democracy, but ochlocracy. That is exactly why we have representative democracy. If referendums would be a poor way to decide on health and safety, air traffic control, or education, they are an exceedingly poor way to decide a matter as momentous as membership of the EU. This is and should be a matter for Parliament, taking all factors into account.
Where it comes from
From Middle French ochlocratie, from Ancient Greek ὀχλοκρατία (okhlokratía), from ὄχλος (ókhlos, “multitude, crowd”) + κράτος (krátos, “power”). Equivalent to ochlo- + -cracy.
Adapted from the Wiktionary entry ochlocracy (CC BY-SA 4.0).