What is a corrupt society called?

Hi all,

First time posting here. Please forgive my ignorance of procedures and culture.

Disregarding differences in philosophicall positions, I once heard that there were 3 forms of government (Kingdom, Republic, & Democracy) and that they had different terms for when they became "corrupt" (Dictatorship, Oligarchy, & Mob Rule).

I wanted to ask, is there a term to describe a "corrupt" society?

Thank you for your time.